The more I look at your design the more I like it’s simplicity and ease of use , we all know it’s accurate and that’s the bottom line ! Looks like I will be buying one in the near future !
Very nice & informative video not only for prophet but also for any high end pcp rifle.Keep this good work going to help & encourage other people who are in this wonderful sport
Great easy to understand information that's pure gold to a new Prophet owner. I went with the .25 but, .22 barrel is in my very near future. First I wanna chuck some .25's. I have a Walther Reign in .25 that's throws H&N Barracuda hunters almost in the same hole at 50 yards but, that power curve is not easy to play when you wanna do a lot of shooting. The consistency of a regulator is required for precision shooting.
Hi Gregor, this is a perfect explanation on how to tune and play with RTI Priest/Prophet settings. Very usefull and very clear explanation, keep the good work!
Hi Gregor, thanks for sharing. I wish you could have show the tuning with an actual chronograph. I've found something with my Priest that I don't understand while tuning the hammer spring tension. I start as you explained with the spring lose and I start tightening little by little and I see my speed increasing, and this what typically you will see with other rifles, with other rifles, if you tighten too much you won't be able to cock the rifle anymore, well with the Priest what I see is that at some point the velocity drops even if I'm tightening, do you know why is that? I was expecting that at some point I don't see an increase anymore, so I reach the plateau, no matter if I keep tightening I don't gain more power, but with the Priest at least, it is really hard for me to find the plateau speed, because at some point it start dropping. I'll do a video about this on my channel, because I'm changing ammo soon and I want to change the tune for the new ammo
That is perfectly normal. The reason why the velocity drop is because the hammer spring tension was so big that the hammer opened the valve fully and then still had enough energy to hit the end of the travel limit. If you think about it, when you have correct hammer spring tension, the hammer should not hit the the end and the valve should slow down the hammer and start to accelerate it back. This is a gradual process and takes more time than if the hammer hits the stop and starts to accelerate back. So the valve ended up begin opened for shorter time and you got lower velocities. This would happened on any gun but as you mentioned, others have adjustability limits but if there are limits, you might not be able to set the hammer spring tight enough if you have really high pressure and you want really high power... So RTI deliberately allows you to go over, just so you have a genuinely fully adjustable gun even for high powers. The procedure is as I explained. just find the peak velocity at the pressure you are at (this does not mean that you have to fully screw in the hammer spring tension screw, it just means that you adjust the hammer spring tension until you find the max...) and then you reduce the hammer spring tension until you reach about 30 fps less than was the max.
@@gregorkamensek3923 Thanks for the response, that's exactly what I was doing, finding the maximum while modifying the tension, I was by no mean screwing the spring tension to the max, but what I found challenging was that at some point I saw the speed dropping and I was sure what was the max, maybe I was rotating it too much, I was doing a 1/4 turn, I might need to try again at 1/8 of a turn, anyway I'm really glad you explained because even when I was doing exactly what you described I was not sure why at some point I was experiencing a drop on speed. It all makes now perfect sense! Thanks once more and I hope I can get my hands around that Prophet! Remember one day you told me to wait for it, well I was needing a gun and I pulled the trigger on the Priest2 and I couldn't be happier. I think Nate showed to you some of the 3d Print mods I did to my gun and you wanted to try them in blue, if you still interesting you can contact me personally at orioniguanahunter@gmail.com, thanks once more!
@@OriOnTheIguanaHunter Yes, of course I remember you asking about waiting and also about the accessories. If I remember correctly, they would not fit because I have the extended plenum... I will send you my email...
I have an RTI Prophet , and at 110 bar and a slightly heavier hammer spring , it is shooting at impressive accuracy, at approximately 15 foot pounds, with only a 5 foot spread over 200 shots .That is absolutely amazing
Very good info. Clear and understandable. Thanks also on not just the relationship between regulator and hammer, but how to do it. I’ve been air gunning for two years and this is the first time someone explained clearly. Thank you. I watched this video because in one week I’m going to buy a performance model r t i . Now I will know what I’m doing. Oh buy the way did you know that barrel has a 1 in 32 twist. J s b redesign are supposed to be the pellet for this gun.
@@gregorkamensek3923 oops , my bad. Congratulations on your accomplishment. I have a feeling your design will be used with competing manufacturers. The information you give us is valuable and much appreciated. My r t I prophet performance in .22 & .177 barrel kit should be in my hands in a week. Only accurate guns are interesting.
Bro i have priest 2 perfomance .177 call, if i want to use zan slug can u give me a tips for tunning... example like did i have to change the barrel or make transfer port to 3 mm or up? Btw my priest running reg 150 bar.. Thank you
Yes, if you have the one way valve installed (the one that is usually making the squeaking sound when firing the gun), you have to drain the plenum. You can either dry fire or release the air via the bleed screw in the back of the gun.
@@gregorkamensek3923 thanks for the clarification. So unloosing the bleed screw at the back will drain the plenum as well? In that case, I don't have to dry fire.
Hi Gregore thanks for the video. It would be nice if you could make a video on adjusting the standard regulator too. I believe one has to bleed the bottle empty before making adjustments, so plz explain how one can do that? For hammer spring adjustment, is it possible to do without upgraded butt pad? If yes plz show that too.. Regards
The standard regulator does not have any simple was of adjustment, not even on the inside. Basically the only way to adjust it is to add/remove very thin washers (to server as a spacer) to spring washers...
I’m late getting the update as per uTube algorithms but great video. Are the transfer ports the same on the priest 2 premium (before profit release) or are they different? Asking because I’ve updated to the power plenum and side lever cocking. Thanks again for the very straight forward tutorial.
As far as I know, the TP and the valve size got enlarged the same time Prophet was released. This is because they are using the same body for both of these guns. But I am not 100% sure...
instead of using millimeters from flush for the hammer spring, can you use turns out from “home”? I am that would be easier for people without the necessary measuring tool that you use. Thanks so much, love the channel!
Hi. Of course you can use turns but I never paid attention to the revolutions so I do not know how many you need to make for a particular change. In any case, there will be diferences from gun to gun so I think that best is if everyone figures it out for them self.
Hello Gregor, I’m very close in buying the Prophet but was wondering if it can be adjusted under 12/lb for backyard plinking? With the larger plenum and longer barrel not sure if it would be possible? Also did you say the .22 long range has a longer shroud because it has baffles in it? Thanks for the videos! Keep’em coming! Thx!
Hi. RTI would probably answer this better than I, I believe they prepare the guns specially for the countries with 12/lb limitation, so if you buy the gun in UK, it should be already adjusted to this limit. Unforunately, there are no baffels in the shroud :) I am hoping they will introduce this in the future, I have already made this proposition to them a few times...
Hi Gregor, nice explanation of the initial setup. My question is about using 2 different pellets, e.g. JSB heavy and monster. Is it convenient to make the reg and spring tension setup for the monster and once i want to pass to the Heavys to use the only hammer screw to reduce the speed? Is this going to affect the air efficiency? Thanks.
Generally, if you have higher pressure than needed for a specific pellet speed and you reduce it by lowering hammer spring tension, the air efficiency is better. That does not necessary mean that you will get more shots per fill (it will probably be about the same as with lower pressure) as your available pressure difference (fill pressure - reg. pressure) will be lower as well...
hello Gregorio bought a Prophet Cal 5.5 ... I'm Italian I saw your video where you explain many important things about the Prophet. as I don't understand your language I ask you very kindly if you could give me some advice and explain how I can best use this rifle. .. that is how can I bring it to the power of 80 jaul? fit a loterwalter rod? do you think you advise me to put the pressure regulator? and apart from the loading lever, what difference is there with the Priest 2? give me more tips to shoot with this high performance rifle ... thanks roberto
Hi Gregor, hello from Austria. I´m owner of a Priest 1 since more than one year, did all upgrades to Priest 2 and now to Prophet. Only the original barrel 022 is left. Up to 840 ft with pelles the accuracy is OK, with higher velocity it becomes more flyers. Normaly i`m using JSB Heavy Monster Redesign pellets. Is the new longer barrel only for pellets OK, or is it also useful for slugs ? Can you help me to get a Lother Walter long range Barrel for slugs ? ( more twistrate !! ) Best Regards, Harry
Hi. For pellets, what you need is the "5,5 LR" barrel. This is the RTI barrel dedicated for pellets. It is made by LW by RTI specs. With that barrel, you can shoot JSB Monster Redesigned at 310, 320 m/s and still get stable long range performance. I am shooting a 2,5 cm circle at over 100 meters and I get a hit probability of about 90%. I have a video about this barrel. But this barrel will not shoot slug well. I would recommend getting the long (Prophet) version - 60 cm. You will also need the pressure set to about 170-180 bars and hammer spring adjusted. BTW: do you still have the old body (back side)? Old body has slightly smaller ports so you might not get full 320 m/s power but rather about 300 m/s... This is by far the most accurate setup I have tested. No other gun that I have tested was ever more accurate. For slugs, it is a different story. To tell you the trough, I haven't yet find a barrel and slugs that would outperform pellets at close range. And for long range, I also haven't find any barrel / slugs that would outperform JSB Monster redesign in long range barrel. I am constantly trying to get good performance with different slugs but I am not satisfied with the results. The problem is that the slugs that are now available are reverse engineered to shoot in pellet barrel that are not designed for this. So the results are acceptable but not really good. What needs to be done (and already has been done by FX but is very limited to use in FX guns and also has its own problems) is design a barrel for the slugs that are on the market... So far, I do not have any really good solution for you. Simply having higher twist rate will not bring better results, it needs to be designed form ground up to slugs...
@@gregorkamensek3923 Hi Gregor, my configuration have all actual parts of RTI, front and backside new body, the new side lever, the moa rail, the back plate and the new regulator. The power plenum i will produce with my machinery. Because i will integrate a second gauge on left side into the plenum tube. Also i will build a adjustable spindle at the back plate to hold the aiming point. Therefore it was also necessary to have a longer side lever. Now i do not loose the target point in my scope, because now it is so smooth to cock the hammer spring. At adistance of 20m , 135 bar, 800 ft/s , and using JBS Heavy Monster redesign i bring 12 shots into a circle 15 mm diameter. ( baffles in the shroud ans a moderator ) Absolutely silent, the noise of the hammer and the plinking at the pellet chaser are louder than the expanding air at the muzzle. I think i will follow your advice and order the new lr barrel with the new shroud. Best Regards, Harry
@@haraldschweiger2086 Yes, the long range barrel is really excellent for pellets. Also try to get the "good" Monsters Redesign. There are different batches and you should get the ones that have shallow hole in the skirt...
@@gregorkamensek3923 Hi Gregor, now i have produced my power plenum with gauge on the left side. I´m shooting with 160 bar, 980 ft/s and about 74 j with monsters redesign. 20 meters, 12 pellets, 12 mm circle. Best thanks for your advice, If you give me your email, i will send you some pictures. Best Regards, Harry
@@haraldschweiger2086 Hello. I am happy to hear that. I don't like to share my email on chat massages, but I am happy to reply if you either send me a private massage or if you give me your email.
Hi Gregor, I saw you listed the regulator in your description however there's no purchase option. How and where can I buy one? I also have another question. I also have the RTI Prophet and the gauge for the bottle isn't climbing and is stuck at 100, however the bottle is at 300 bars, any reason why this would happen? If there's no option to buy on the website do you sell the regulator with the 2 guages as well?
I have the uk version of this with reg at 90bar when firing this i get very loud ping from the reg ?but at 150+bar theres no ping at all any ide why it does this ? Rti have said to remove a check valve ? To stop it doing it your thoughts on this please gregor
Hi Gregor , sorry to be a pain but you see like the best guy for it , is there any chance you can do a trigger adjustment vid for this rifle pls ? mine just isnt playing ball , quoted as going down to 200g pull , but its more like 3 lbs , even with the screw removed . Or more likley I am just doing it wrong.
I am assuming you have the newer adjustable trigger. you have 2 screws (allen 1,5 mm I believe). The rear screw adjusts sear engagement, if you want to set it for short second stage you have to turn it clockwise. The front one sets the spring (weight) of the second stage. To have it lighter, you have to rotate it clockwise. Note that if you have the front screw too far out (ant clockwise), the sear will not engage because there will be no spring tension to return it so rear screw will have no effect either and you will not be able to cock the hammer. Same goes for the rear screw, if you rotate too much in (clockwise), the sear will not be able to catch anymore and you will not be able to cock the gun. I would suggest that you have the front screw somewhat screwed in in the beginning, then tune the rear screw to have short but still safe coking (when you cock the gun, you should be able to hit the gun with your hand in any direction without it going off), then you make the second stage lighter with front screw and follow the same safety procedure. I usually do it the following way. I have the front screw in about half way, then i cock the gun (make sure there is no pellet in the gun), then start to turn in the rear screw (clockwise) slowly until the gun fires. Then go back (anticlockwise) about 1/2 revolution. After that adjust front screw (weight) to your liking...
@@gregorkamensek3923 excellent reply Gregor !! Much appreciated , I just wanted a lighter pull , wasn't too fussed about how long the first stage was but as you say I couldnt cock the gun, this was worse when it was filled above 230 bar , so after a bit of degassing it was working ok but not set up as i wanted it . So still tweaking to get it right .
Hi Gregor can I ask you something ? 10 ms less from maximum power for efficency but if you have a short barrel like 40cm this can be more like 15/18 ms less from maximum velocity because barrel is shorter right it make sense?
Hi. The 10m/s is just a guideline and not a strict rule. Test and see what is best for you. This should be valid for shorter barrels as well though, so there should not be and difference other than the max velocity at particular pressure being lower.
I doubt it. This gun has 600 mm long barrel which is considered as a "long" barrel. I do not see any need for having longer barrel considering this gun power performance unless it is for some custom slug project...
I’ve got a priest 2 I’ve not taken the barrel out but I’ve measured it to where the barrel ends in the shroud it’s 24 inches plus it’s got 6 lands in the barrel is it a LW Barrel. ?
I’ve been waiting along time for my Rti Prophet but very disappointed because it is so loud on my ear it is making me deaf. The noise is unbearable from the hammer end, is this usual or is there a problem
When tuning, do I achieve the same results by maxing out the hammering spring and setting the pressure to reach target FPS + 30 FPS? Then reduce the hammer spring to reach the target FPS. This is the process I follow on FX airguns. I'm still learning the tuning process.
Yes, this procedure is good for all conventional valve adjustable PCP rifles including Prophet and The Priest II. Prophet II on the other hand uses pressure assisted valve and on that valve the procedure is slightly different, basically all you have to do is to adjust the pressure the results in desired velocity.
@@EdBraunbeck The answer is: no, you do not need to adjust the hammer spring. Prophet 2 has pressure assisted valve. For this valve, you only need to adjust the hammer spring once at the highest pressure you ever intend to shoot. After that, you adjust the pellet/slug velocity only with pressure.
You can adjust the 1st stage of the trigger to be longer by threading out the connecting rod of the trigger a bit. I assume that the safety does not work because you reach the 2nd stage of the trigger before the safety limits triggers travel
Don’t you have to empty the reservoir and regulator completely (all pressure out) before decreasing the regulator to prevent damaging the regulator (seals) ??
Not in this design of the regulator. Many regulator do require the air to be drained out or at lease lowered below working pressure. If RTI ever comes out with such design, you can be sure that I will state this very clearly in the video.
A question: The priest 2, standard version: pressure in 22 is 120 bar and cannot be changed? If I add the pressure regulator, may I increase the pressure for the same caliber? Do I need extra parts to come along with the regulator to increase the power? Thanks for your kind answer.
On standard versions, regulators are fixed. You could change the pressure but you would need to add / remove washers in it (I do not recommend if you don't have experience with this yet). If you want to increase power, you will need to make the hammer spring tighter. You can do this by adding some spacer in the back side of the spring, but it is not as elegant for fine tuning as the adjustable but pad form RTI.
@@gregorkamensek3923 Thanks Gregor, I appreciate your kind answer. Have another couple of questions to your knowledge as I own the priest 2 in .25 (with also the 22 conversion) but I'm not able to unscrew the aluminum bottle. It's hard like hell. Since I don't want to damage the gun, I let it on but noticed that the bottle itself moved and pivoted towards the barrel. I just pushed it away as it was but I don't think it's normal. Do you have any tips for this issue? Thanks alot again. I'm from Italy.
@@thejack01 It is quite hard to unscrew the bottle while under pressure and also, not all RTI guns use one way valve... So it you do not know if you have it, I would not advise it. As for the moving of the bottle, the thread on the regulator (that is threaded in the gun) in quite big and it is never fully screwed in so you can have the pressure gauges on the appropriate position. The pressure is what is holding the bottle in a specific position, so it can have some flex. This is normal.
Hi Gregor, I'm from the Philippines and I'm interested to get a RTI Prophet. Just want to know if you experience some problems with your unit like regulator creep (first shot at lower speed and some annoying/hissing sound from the regulator after firing) and bad lever cocking (some grinding of metals during cocking making it hard to cock?.. Thanks in advance!
Hello. Older regulators had some problem with creep but the newer ones are much better. There is still some sound occasionally by the regulator after the shot is taken. I did not have any problem with cooking but the gun I use the most is a prototype version. The production version I just started to use (about 2 months ago) and till now, I did not have any issues.
@@gregorkamensek3923 shot it the first time today, very impressed with how quiet it is fitted with a Donny fl Tanto mod it, very pleased with my purchase.
@@gregorkamensek3923 .25 ACP slugs ? I was talking about the roundnose boat tail slug mold you designed. Have you done any testing ? Hope to see your video on this soon. Tq.
@@brokenarrow61 Ah, OK. Yes those fit in the magazine but I do not recommend them for Prophet or and other PCP that pushes the slug in the barrel... They are quite large. If you size them, then it is OK. I am working (with MP molds) to have a mold for modified .25 ACP slugs for airguns. Those would be hollow point and slightly lighter. 48 grain is a bit much for Prophet and even more for most other guns...
@@gregorkamensek3923 Well that is exactly the reason I am asking... Do you have any other solutions or ideas, than a silencer. Reason for asking is that my friends FX Impact Mk2 is much quieter dan the Prophet, even without a silencer. So I thought maybe they use a better material for the shroud in the FX?
@@ronaldkonings8117 Slovenia (where the gun is produced) has restriction about this (as I mentioned) but I am trying to convince them to put more effort into this for the international market so I am hoping they will work on this.
For any calibre pcp would it be better to set your regulator at high pressure but use your hammer spring tension to increase/decrease your fps as required?
Depends on what you mean by better... but general answer would be NO. Also, this is not possible with pressure assisted valves. The only reason why it would be better is because of air consumption and in some cases, it can give better accuracy because there is less pressure behind the pellet once it leaves the barrel. But there are a lot of problems with this setups such as velocity inconsistency, requires much higher regulator precision, you have to top up the gun sooner,... So it is always best to be close to what the pressure enables - just under the max velocity.
@@gregorkamensek3923 hi i am still quite new to pcp. I bought a .177 pistol/carbine with 10.6 inch barrel unregulated shooting 8.7gr @ 720-740 fps out of the box. I wanted to buy a regulater being sold to install. There is no pressure gauge on it and i have to request them what pressure i want it set. It is then installed on to the air cylinder looking like a few inch cylinder extension. would like to shoot 9.56gr at about 840-860fps. The regulator comes with a 33cc plenum. The settings can be between 90 to 150 bars as per request.
@@Lucas-ix8bgI assume we are not talking about RTI gun here so I will not be able to help. I could only help you if I knew the gun you have in extreme details which I do not (and I will not even if you tell me a model and brand)... Also, you are requesting higher velocity with higher pellet weight once regulated. That might not be possible and even if possible, it will reduce shot count significantly.
@@gregorkamensek3923 yes i have realised that the pcps are complicated machines even though the mechanism looks simple. Thanks for taking your time to respond. GBU
Hi Gregor i want to ask an info about refilling the bottle with externar regulator optional as you have installed. Do i need to refill it when it is installed in the stock or i can fill it apart and than install in the stock? My issue is can i buy a pair of bottles and changes on fly when i am out with the carabine?
Unfortunately no, you have to have it in the gun as externally adjustable regulator does not have one way valve so it will dump air out if you unscrew it form a gun. There is maybe a way to put the regulator to 0 bar but I would not advise to use this option...
@@gregorkamensek3923 how is the max setting of the spring in term of turns from flat position? I mean the setting you dont suggest in any case to push it over.
@Massimo Piccioni the tipping point (were you go over max. power for the particular pressure with increasing hammer spring) depends on pressure. At lower pressure, you will reach that point sooner and vice versa. This is also why RTI does not limit this adjustment because if they limit if for example for 150 bars, then you would not be able to even reach max. power at 170 bars...
@@gregorkamensek3923 Hello Gregor, Some great tuning that is, reaching 250 ms wit 68 grain. With reg at 180 bars using the ZAN 49 grains it reached 256 ms (priest 2 performance version). With ZAN 45.5 grains it reached 265 ms. Nielsen slugs performed the same. At 180 bar springtension is set at about 9mm. My question how did you tune it to shoot that fast with 68 grains, are the ports different on the priest2 vs prophet? Or do I need another spring or something? Thanks in advance
@@gregorkamensek3923 Hi Gregor, thanks for the reply. I just ordered the prophet performance spring. I was thinking of also ordering the prophet hammer, but i wasn't sure if the hammer that came with the .30 cal priest2 isn't already that hammer. It looks the same, as far as weight concerns i'm not sure. Do you have a suggestion on which way to go with the hammer? Thanks.
Are you sure it is form the hammer? I would assume it is either form the screw that holds the barrel or pellet pusher or even around the barrel. Anyway, if it is form the barrel then you need to replace the o-rings on the barrel, same with pellet pusher. It is normal to have some air escape form the screw, but if it bothers you, you can use some blue thread lock, just put it on the screw and screw it in...
@@gregorkamensek3923 yes air comes out of the hammer area ,just below the pellet probe. I tested the barrel and pellet probe and there is no air at all. But as you just helped me now,RTI members told it is natural as you said. But I set my pressure at 140 bars ,when I shoot , it comes down to 130 bar and it seems to stay there during shooting which means I need to compensate that and raise it to 150 bars ,in this way ,I can get to 140 bar,what do you think ? Is this natural too?
@@weirhauch1002 it is normal, yet. After setting the pressure by regulator screw, you need to take a few shots and then repeat adjustment if the pressure is not as you desired. It is quite topical that the pressure goes up too much and then settles down when you make a few shots.
Hola buenas noches, quiero hacerle una pregunta como se cuando una válvula esta deteriorada o mala me e comprado un prophet ll y no se si la válvula este funcionando bien porfavor
If the valve does not leak, then I don't see any reason that there is something wrong with it. Did you notice any anomalies? Is the power not appropriate in relation to the reg. pressure?
yes, the truth is that I think I have to get used to how the rifle works, it is because I have never had one with a plenum box and regular power at this level, what I have doubts about is only when the air passes through the plenum box, sometimes it takes longer to pass air towards it, I have noticed it when under power for example at 90 bar it takes longer and when I go up to 130 or 150 bar it is nothing that takes time to fill the plenum, that is it, on the page it says that it only takes 1ms but it is not the same When lowering the power I don't know if I'm doing something wrong.
@@charlesronaldfontealbasagr1826 It is normal that the plenum fills back up quicker at higher pressure but it never fills up during the fire cycle so this does not affect the valve operation in any way. Also, at lower pressures, the valve is opened for longer time so it drains the plenum slightly more, that is also partially the reason why the plenum fills up slower... The 1ms you saw on the web page is referring to the valve opening time and has nothing to do with plenum refilling time... Just a side note: slower regulators (longer refiling of the plenum) is better in terms of pressure accuracy as during refilling, there is also thermodynamics transient phenomenon to be taken into account. Anyway, I assume that your valve operates exactly as it is supposed to...
First of all, not to make anyone angry, I said that it is the most accurate gun I ever used / owned :) But yes, it is the barrel along with adjustability. There is quite a few pellet guns that achieves this at closer range , but when you get to 100 + yards, they loose the accuracy. Plus given the fact that you can shoot pellets at extremely high velocity at longer ranges, it makes it less sensitive to wind as conventional pellet guns shooting at conventional speeds (up to 900 fps). I will have some videos soon shooting 2,5 cm target at 102 m (111 yards) soon...
Maybe with the screw in the stock would be better to "unpressure" no? On mine i do it with screw not with shooting. Much quicker, only i need a alen key.
That is also an option of course. But I would still suggest shooting as the bleed screw is not intended to be retighten under pressure and it might destroy the o-ring and start to leak after a while.
hello Gregorio bought a Prophet Cal 5.5 ... I'm Italian I saw your video where you explain many important things about the Prophet. as I don't understand your language I ask you very kindly if you could give me some advice and explain how I can best use this rifle. .. that is how can I bring it to the power of 80 jaul? fit a loterwalter rod? do you think you advise me to put the pressure regulator? and apart from the loading lever, what difference is there with the Priest 2? give me more tips to shoot with this high performance rifle ... thanks roberto
@@edgarmaynard5835 Maybe I can suggest you to purchase only the body of Prophet / Priest... You can also increase the pressure, hammer weight and hammer spring, but you will always have the air flow as a limiting factor...
@@gregorkamensek3923 thanks for the update i will have a think about it . I got the Mk1 back on song it was the sound mod that was the problem with accuracy
@@gregorkamensek3923 Dober večer. Imam Priest2 z regulatorjem tlaka in nastavljivo vzmetjo na zalogi. kaj bi zaslužil, če bi zamenjal vzmet s težjim in težjim kladivom? Hvala vam. Imej lep večer.
Mr Gregor. On my prophet in order to reach the same velocity you have reached of about 1040 fps I have to put reg pressure at 180bar but the hammer spring at about 7.5mm. Do you think thats too much considering you have reached same speed with only 5.7mm hammer spring. Also I cannot tune it the way you explainned on going about 30fps above desired speed then go down with hammer spring 30fps to get good efficiency. To reach 1040fps the max my prophet can go is about 1050fps and no more so if I want 1040fps I had to go 1050fps and then go back with hammer spring to 1040fps. I hope this is clear me trying to explain. For best accuracy/consistency what's better, higher hammer spring to barely reach speed or higher pressure and go down in speed with hammer spring?
If it works, it should be OK. RTI had used few different options regarding spring so it is possible that mine was different. Regarding velocity it is also OK. My suggestions are a guide but there can be some differences form gun to gun. The important is that you get the correct power and accuracy.
You can of course. You can use slugs in all RTI guns. The only thing that RTI is saying that RTI Long Range pellet barrel is designed for pellets. I have report of some people that the get good results using pellets even in those barrels. All other barrels in RTI guns are conventional airgun barrels so they should shoot slugs reasonable well.
Hello Gregor I have a problem with the adjustable regulator on my Prophet Performance. I was shooting several months at 160 bar shooting the JSB Monster Redesigned at 300m/s. Today I changed the regulator to 90 bar to shoot lighter pellets. The problem was that the speed dropped each shot See the results Ie serie 2e serie 3e serie 293 m/s 304 298 281 297 288 272 289 277 267 276 268 257 271 264 255 268 261 254 261 253 252 275 255 249 266 251 249 280 253 248 270 256 264 248 The regulator kept steady at 90 bar. Then I tried at 120 bar, now the problem was that the speed klimed at each shot
Speed rise 267, 272, 269, 281, 282, 280 After 5 min the speed dropped again to 26s m/s and then began to rise again. 261, 270, 280, 281, 285.
At 130 bar the same problem 259, 266, 274, 279, 282, 286 After 5 min 263, 272, 279, 278, 280, 283
I took 50 shots before I started measuring with the crony.
So at 90 bar the speed is dropping and at 120/130 bar the speed is rising. All the time I was shooting the monsters the speed was consistent 300m/s. Any idea what the problem could be?
The more I look at your design the more I like it’s simplicity and ease of use , we all know it’s accurate and that’s the bottom line ! Looks like I will be buying one in the near future !
I've watched this podcast 3 or 4 times now!! Thank you for your very in-depth talk on the prophet's precious and spring precious!! Much appreciated.
High Gregor, hello from the UK very well explained i always look forward to seeing your videos great work stay cool atb Dave
Thanks :)
Very nice & informative video not only for prophet but also for any high end pcp rifle.Keep this good work going to help & encourage other people who are in this wonderful sport
Thanks!
Great easy to understand information that's pure gold to a new Prophet owner. I went with the .25 but, .22 barrel is in my very near future. First I wanna chuck some .25's. I have a Walther Reign in .25 that's throws H&N Barracuda hunters almost in the same hole at 50 yards but, that power curve is not easy to play when you wanna do a lot of shooting. The consistency of a regulator is required for precision shooting.
Very good information , now I know how to tune the RTI PROPHET 22 when i get one October waiting for them to hit USA market 💥
Tomorrow ,I will get mine 😬👍
Hi Gregor, this is a perfect explanation on how to tune and play with RTI Priest/Prophet settings. Very usefull and very clear explanation, keep the good work!
Hi Gregor, thanks for sharing. I wish you could have show the tuning with an actual chronograph. I've found something with my Priest that I don't understand while tuning the hammer spring tension. I start as you explained with the spring lose and I start tightening little by little and I see my speed increasing, and this what typically you will see with other rifles, with other rifles, if you tighten too much you won't be able to cock the rifle anymore, well with the Priest what I see is that at some point the velocity drops even if I'm tightening, do you know why is that? I was expecting that at some point I don't see an increase anymore, so I reach the plateau, no matter if I keep tightening I don't gain more power, but with the Priest at least, it is really hard for me to find the plateau speed, because at some point it start dropping.
I'll do a video about this on my channel, because I'm changing ammo soon and I want to change the tune for the new ammo
That is perfectly normal. The reason why the velocity drop is because the hammer spring tension was so big that the hammer opened the valve fully and then still had enough energy to hit the end of the travel limit. If you think about it, when you have correct hammer spring tension, the hammer should not hit the the end and the valve should slow down the hammer and start to accelerate it back. This is a gradual process and takes more time than if the hammer hits the stop and starts to accelerate back. So the valve ended up begin opened for shorter time and you got lower velocities. This would happened on any gun but as you mentioned, others have adjustability limits but if there are limits, you might not be able to set the hammer spring tight enough if you have really high pressure and you want really high power... So RTI deliberately allows you to go over, just so you have a genuinely fully adjustable gun even for high powers. The procedure is as I explained. just find the peak velocity at the pressure you are at (this does not mean that you have to fully screw in the hammer spring tension screw, it just means that you adjust the hammer spring tension until you find the max...) and then you reduce the hammer spring tension until you reach about 30 fps less than was the max.
@@gregorkamensek3923 Thanks for the response, that's exactly what I was doing, finding the maximum while modifying the tension, I was by no mean screwing the spring tension to the max, but what I found challenging was that at some point I saw the speed dropping and I was sure what was the max, maybe I was rotating it too much, I was doing a 1/4 turn, I might need to try again at 1/8 of a turn, anyway I'm really glad you explained because even when I was doing exactly what you described I was not sure why at some point I was experiencing a drop on speed. It all makes now perfect sense! Thanks once more and I hope I can get my hands around that Prophet! Remember one day you told me to wait for it, well I was needing a gun and I pulled the trigger on the Priest2 and I couldn't be happier. I think Nate showed to you some of the 3d Print mods I did to my gun and you wanted to try them in blue, if you still interesting you can contact me personally at orioniguanahunter@gmail.com, thanks once more!
@@OriOnTheIguanaHunter Yes, of course I remember you asking about waiting and also about the accessories. If I remember correctly, they would not fit because I have the extended plenum... I will send you my email...
Thanks for a very informative and helpful video.Would the same principles of tuning also apply to slugs?Thanks again
Yes, same method applies to slugs. Note that tuning for Prophet 2 and 3 is slightly different due to pressure assisted valve.
I have an RTI Prophet , and at 110 bar and a slightly heavier hammer spring , it is shooting at impressive accuracy, at approximately 15 foot pounds, with only a 5 foot spread over 200 shots .That is absolutely amazing
:)
Really good video! Thank you Gregor for sharing this information!
Excellent video.
God bless you brother. 🎯
Hi Gregor, Thank you for the video. It was very helpful in helping me tune my new Prophet..... Good job.....
Quite informative, Gregor, thanks for sharing!
Very good info. Clear and understandable. Thanks also on not just the relationship between regulator and hammer, but how to do it. I’ve been air gunning for two years and this is the first time someone explained clearly. Thank you. I watched this video because in one week I’m going to buy a performance model r t i . Now I will know what I’m doing. Oh buy the way did you know that barrel has a 1 in 32 twist. J s b redesign are supposed to be the pellet for this gun.
Yes, I designed the Long Range pellet barrel for RTI. You can use any pellet but JSB RD and 18 grain work best.
@@gregorkamensek3923 oops , my bad. Congratulations on your accomplishment. I have a feeling your design will be used with competing manufacturers. The information you give us is valuable and much appreciated.
My r t I prophet performance in .22 & .177 barrel kit should be in my hands in a week.
Only accurate guns are interesting.
Hola .. el plenum debe sonar en cada disparo ??? Gracias
Hola Gregor. Tengo el prophet performance 5.5 quisiera saber cual es el máximo que se puede subir el regulador? Soporta 200 a 210 bares?.
Bro i have priest 2 perfomance .177 call, if i want to use zan slug can u give me a tips for tunning... example like did i have to change the barrel or make transfer port to 3 mm or up? Btw my priest running reg 150 bar..
Thank you
With the 177 cal dose it have the transfer port grub screw in it for FAC .
Awesome. Thankyou
Hi, great video. To disassemble the gun with the power plenum. After taking out the bottle. Do I need to dry fire to let out the air in the plenum?
Yes, if you have the one way valve installed (the one that is usually making the squeaking sound when firing the gun), you have to drain the plenum. You can either dry fire or release the air via the bleed screw in the back of the gun.
@@gregorkamensek3923 thanks for the clarification. So unloosing the bleed screw at the back will drain the plenum as well? In that case, I don't have to dry fire.
Hi Gregore thanks for the video. It would be nice if you could make a video on adjusting the standard regulator too. I believe one has to bleed the bottle empty before making adjustments, so plz explain how one can do that?
For hammer spring adjustment, is it possible to do without upgraded butt pad? If yes plz show that too..
Regards
The standard regulator does not have any simple was of adjustment, not even on the inside. Basically the only way to adjust it is to add/remove very thin washers (to server as a spacer) to spring washers...
I’m late getting the update as per uTube algorithms but great video. Are the transfer ports the same on the priest 2 premium (before profit release) or are they different? Asking because I’ve updated to the power plenum and side lever cocking. Thanks again for the very straight forward tutorial.
As far as I know, the TP and the valve size got enlarged the same time Prophet was released. This is because they are using the same body for both of these guns. But I am not 100% sure...
instead of using millimeters from flush for the hammer spring, can you use turns out from “home”? I am that would be easier for people without the necessary measuring tool that you use. Thanks so much, love the channel!
Hi. Of course you can use turns but I never paid attention to the revolutions so I do not know how many you need to make for a particular change. In any case, there will be diferences from gun to gun so I think that best is if everyone figures it out for them self.
Buenas,se le podrá poner un plenum extra en la conexión foster de la culata¿
Gracias.......
How can I get parts for my preist as I can't find them anywhere and it's failed 3/4 months in
I don't have any other answer for you than: RTI or better yet distributor...
Hello Gregor, I’m very close in buying the Prophet but was wondering if it can be adjusted under 12/lb for backyard plinking? With the larger plenum and longer barrel not sure if it would be possible? Also did you say the .22 long range has a longer shroud because it has baffles in it? Thanks for the videos! Keep’em coming! Thx!
Hi. RTI would probably answer this better than I, I believe they prepare the guns specially for the countries with 12/lb limitation, so if you buy the gun in UK, it should be already adjusted to this limit. Unforunately, there are no baffels in the shroud :) I am hoping they will introduce this in the future, I have already made this proposition to them a few times...
Yes I think I’ve taken all the first stage travel out of the trigger so the safety doesn’t work I’ve had to back it out again.
Hi Gregor, nice explanation of the initial setup.
My question is about using 2 different pellets, e.g. JSB heavy and monster.
Is it convenient to make the reg and spring tension setup for the monster and once i want to pass to the Heavys to use the only hammer screw to reduce the speed?
Is this going to affect the air efficiency?
Thanks.
Generally, if you have higher pressure than needed for a specific pellet speed and you reduce it by lowering hammer spring tension, the air efficiency is better. That does not necessary mean that you will get more shots per fill (it will probably be about the same as with lower pressure) as your available pressure difference (fill pressure - reg. pressure) will be lower as well...
@@gregorkamensek3923 hello if I turn the reg up to much will it go above the uk legal limit ??
hello Gregorio bought a Prophet Cal 5.5 ... I'm Italian I saw your video where you explain many important things about the Prophet. as I don't understand your language I ask you very kindly if you could give me some advice and explain how I can best use this rifle. .. that is how can I bring it to the power of 80 jaul? fit a loterwalter rod? do you think you advise me to put the pressure regulator? and apart from the loading lever, what difference is there with the Priest 2? give me more tips to shoot with this high performance rifle ... thanks roberto
Can you give me you email?
hello gregori ... here is my email liberatore.roberto69@gmail.com
hello Gregor, will there be a slug barrel any time in the future, thanks you.
I don't know...
Stewart Gash I’ve emailed RTI with that question. Their answer was vague at best. Maybe yes maybe no.
135 bar =890 fps is an old setting for my hw100,good video 👍🏻👍🏻
Hi Gregor, hello from Austria.
I´m owner of a Priest 1 since more than one year, did all upgrades to Priest 2 and now to Prophet.
Only the original barrel 022 is left. Up to 840 ft with pelles the accuracy is OK, with higher velocity it becomes more flyers.
Normaly i`m using JSB Heavy Monster Redesign pellets.
Is the new longer barrel only for pellets OK, or is it also useful for slugs ?
Can you help me to get a Lother Walter long range Barrel for slugs ? ( more twistrate !! )
Best Regards, Harry
Hi. For pellets, what you need is the "5,5 LR" barrel. This is the RTI barrel dedicated for pellets. It is made by LW by RTI specs. With that barrel, you can shoot JSB Monster Redesigned at 310, 320 m/s and still get stable long range performance. I am shooting a 2,5 cm circle at over 100 meters and I get a hit probability of about 90%. I have a video about this barrel. But this barrel will not shoot slug well. I would recommend getting the long (Prophet) version - 60 cm. You will also need the pressure set to about 170-180 bars and hammer spring adjusted. BTW: do you still have the old body (back side)? Old body has slightly smaller ports so you might not get full 320 m/s power but rather about 300 m/s...
This is by far the most accurate setup I have tested. No other gun that I have tested was ever more accurate.
For slugs, it is a different story. To tell you the trough, I haven't yet find a barrel and slugs that would outperform pellets at close range. And for long range, I also haven't find any barrel / slugs that would outperform JSB Monster redesign in long range barrel. I am constantly trying to get good performance with different slugs but I am not satisfied with the results. The problem is that the slugs that are now available are reverse engineered to shoot in pellet barrel that are not designed for this. So the results are acceptable but not really good. What needs to be done (and already has been done by FX but is very limited to use in FX guns and also has its own problems) is design a barrel for the slugs that are on the market... So far, I do not have any really good solution for you. Simply having higher twist rate will not bring better results, it needs to be designed form ground up to slugs...
@@gregorkamensek3923 Hi Gregor, my configuration have all actual parts of RTI, front and backside new body, the new side lever, the moa rail, the back plate and the new regulator. The power plenum i will produce with my machinery. Because i will integrate a second gauge on left side into the plenum tube. Also i will build a adjustable spindle at the back plate to hold the aiming point.
Therefore it was also necessary to have a longer side lever. Now i do not loose the target point in my scope, because now it is so smooth to cock the hammer spring.
At adistance of 20m , 135 bar, 800 ft/s , and using JBS Heavy Monster redesign i bring 12 shots into a circle 15 mm diameter. ( baffles in the shroud ans a moderator )
Absolutely silent, the noise of the hammer and the plinking at the pellet chaser are louder than the expanding air at the muzzle.
I think i will follow your advice and order the new lr barrel with the new shroud.
Best Regards, Harry
@@haraldschweiger2086 Yes, the long range barrel is really excellent for pellets. Also try to get the "good" Monsters Redesign. There are different batches and you should get the ones that have shallow hole in the skirt...
@@gregorkamensek3923 Hi Gregor,
now i have produced my power plenum with gauge on the left side.
I´m shooting with 160 bar, 980 ft/s and about 74 j with monsters redesign.
20 meters, 12 pellets, 12 mm circle.
Best thanks for your advice,
If you give me your email, i will send you some pictures.
Best Regards, Harry
@@haraldschweiger2086 Hello. I am happy to hear that. I don't like to share my email on chat massages, but I am happy to reply if you either send me a private massage or if you give me your email.
What would make the regulator drop by 10 bar one day then the next it’s gone back up ..
Hi Gregor, I saw you listed the regulator in your description however there's no purchase option. How and where can I buy one?
I also have another question. I also have the RTI Prophet and the gauge for the bottle isn't climbing and is stuck at 100, however the bottle is at 300 bars, any reason why this would happen? If there's no option to buy on the website do you sell the regulator with the 2 guages as well?
I have the uk version of this with reg at 90bar when firing this i get very loud ping from the reg ?but at 150+bar theres no ping at all any ide why it does this ? Rti have said to remove a check valve ? To stop it doing it your thoughts on this please gregor
Hm, I don't know...
Hi Gregor , sorry to be a pain but you see like the best guy for it , is there any chance you can do a trigger adjustment vid for this rifle pls ? mine just isnt playing ball , quoted as going down to 200g pull , but its more like 3 lbs , even with the screw removed . Or more likley I am just doing it wrong.
I am assuming you have the newer adjustable trigger. you have 2 screws (allen 1,5 mm I believe). The rear screw adjusts sear engagement, if you want to set it for short second stage you have to turn it clockwise. The front one sets the spring (weight) of the second stage. To have it lighter, you have to rotate it clockwise. Note that if you have the front screw too far out (ant clockwise), the sear will not engage because there will be no spring tension to return it so rear screw will have no effect either and you will not be able to cock the hammer. Same goes for the rear screw, if you rotate too much in (clockwise), the sear will not be able to catch anymore and you will not be able to cock the gun. I would suggest that you have the front screw somewhat screwed in in the beginning, then tune the rear screw to have short but still safe coking (when you cock the gun, you should be able to hit the gun with your hand in any direction without it going off), then you make the second stage lighter with front screw and follow the same safety procedure.
I usually do it the following way. I have the front screw in about half way, then i cock the gun (make sure there is no pellet in the gun), then start to turn in the rear screw (clockwise) slowly until the gun fires. Then go back (anticlockwise) about 1/2 revolution. After that adjust front screw (weight) to your liking...
@@gregorkamensek3923 excellent reply Gregor !! Much appreciated , I just wanted a lighter pull , wasn't too fussed about how long the first stage was but as you say I couldnt cock the gun, this was worse when it was filled above 230 bar , so after a bit of degassing it was working ok but not set up as i wanted it . So still tweaking to get it right .
Hi Gregor can I ask you something ? 10 ms less from maximum power for efficency but if you have a short barrel like 40cm this can be more like 15/18 ms less from maximum velocity because barrel is shorter right it make sense?
Hi. The 10m/s is just a guideline and not a strict rule. Test and see what is best for you. This should be valid for shorter barrels as well though, so there should not be and difference other than the max velocity at particular pressure being lower.
Just purchased the Prophet performance and wondering if there will be longer barrel offerings?
I doubt it. This gun has 600 mm long barrel which is considered as a "long" barrel. I do not see any need for having longer barrel considering this gun power performance unless it is for some custom slug project...
I’ve got a priest 2 I’ve not taken the barrel out but I’ve measured it to where the barrel ends in the shroud it’s 24 inches plus it’s got 6 lands in the barrel is it a LW Barrel. ?
Yes, it is LW made RPB barrel.
I’ve been waiting along time for my Rti Prophet but very disappointed because it is so loud on my ear it is making me deaf. The noise is unbearable from the hammer end, is this usual or is there a problem
You are talking about the hammer being loud? I haven't notice it being any louder than any other gun...
can make video to mount hammer spring?
Not sure what you mean, do you mean hammer spring adjustment? This is described in this video.
@@gregorkamensek3923 to see how to change the parts
When tuning, do I achieve the same results by maxing out the hammering spring and setting the pressure to reach target FPS + 30 FPS? Then reduce the hammer spring to reach the target FPS. This is the process I follow on FX airguns. I'm still learning the tuning process.
Yes, this procedure is good for all conventional valve adjustable PCP rifles including Prophet and The Priest II. Prophet II on the other hand uses pressure assisted valve and on that valve the procedure is slightly different, basically all you have to do is to adjust the pressure the results in desired velocity.
@@gregorkamensek3923 To clarify, if I lower the pressure down to shoot lighter pellets, I don't need to adjust the hammer spring on Prophet II?
@@EdBraunbeck The answer is: no, you do not need to adjust the hammer spring. Prophet 2 has pressure assisted valve. For this valve, you only need to adjust the hammer spring once at the highest pressure you ever intend to shoot. After that, you adjust the pellet/slug velocity only with pressure.
Gregor, thanks for your videos! Where are you actually from?
I am from Slovenia
Hello I’ve got the priest 2 if I adjust the length of pull to short the safety won’t work ??? .
You can adjust the 1st stage of the trigger to be longer by threading out the connecting rod of the trigger a bit. I assume that the safety does not work because you reach the 2nd stage of the trigger before the safety limits triggers travel
Hi there , can you tell me what's the brand of the bipod please ? Thank you very much
Accu-tac
Hello Gregor. Im from Slo and i own RTI Prophet. Could i contact you to get some advise on setting the rifle? thank you in advance
Zdravo. Lahko mi daš tel. ali mail, ampak trenutno nisem v slo, tako da na telefon ne bom dosegljiv še cca 14 dni.
Don’t you have to empty the reservoir and regulator completely (all pressure out) before decreasing the regulator to prevent damaging the regulator (seals) ??
Not in this design of the regulator. Many regulator do require the air to be drained out or at lease lowered below working pressure. If RTI ever comes out with such design, you can be sure that I will state this very clearly in the video.
A question: The priest 2, standard version: pressure in 22 is 120 bar and cannot be changed? If I add the pressure regulator, may I increase the pressure for the same caliber? Do I need extra parts to come along with the regulator to increase the power? Thanks for your kind answer.
On standard versions, regulators are fixed. You could change the pressure but you would need to add / remove washers in it (I do not recommend if you don't have experience with this yet). If you want to increase power, you will need to make the hammer spring tighter. You can do this by adding some spacer in the back side of the spring, but it is not as elegant for fine tuning as the adjustable but pad form RTI.
@@gregorkamensek3923 Thanks Gregor, I appreciate your kind answer. Have another couple of questions to your knowledge as I own the priest 2 in .25 (with also the 22 conversion) but I'm not able to unscrew the aluminum bottle. It's hard like hell. Since I don't want to damage the gun, I let it on but noticed that the bottle itself moved and pivoted towards the barrel. I just pushed it away as it was but I don't think it's normal. Do you have any tips for this issue? Thanks alot again. I'm from Italy.
@@thejack01 It is quite hard to unscrew the bottle while under pressure and also, not all RTI guns use one way valve... So it you do not know if you have it, I would not advise it. As for the moving of the bottle, the thread on the regulator (that is threaded in the gun) in quite big and it is never fully screwed in so you can have the pressure gauges on the appropriate position. The pressure is what is holding the bottle in a specific position, so it can have some flex. This is normal.
Hi Gregor, I'm from the Philippines and I'm interested to get a RTI Prophet. Just want to know if you experience some problems with your unit like regulator creep (first shot at lower speed and some annoying/hissing sound from the regulator after firing) and bad lever cocking (some grinding of metals during cocking making it hard to cock?.. Thanks in advance!
Hello. Older regulators had some problem with creep but the newer ones are much better. There is still some sound occasionally by the regulator after the shot is taken. I did not have any problem with cooking but the gun I use the most is a prototype version. The production version I just started to use (about 2 months ago) and till now, I did not have any issues.
@@gregorkamensek3923 Thanks!
Great video Greg.
Hi Gregor is there anything to be gained on a sub 12 UK Prophet by adjusting the hammer spring.
Probably not, I believe they limit the power by TP so the hammer spring is probably already at the optimum position for the pressure...
@@gregorkamensek3923 shot it the first time today, very impressed with how quiet it is fitted with a Donny fl Tanto mod it, very pleased with my purchase.
So, the regulator on the Prophet can be adjusted even if there is active pressure at the carbon fiber tank?
Yes, if you have the Performance version.
Tanks for the video now i know what rifle buy 😃
HI Gregor, do you know if the .25 magazine can take the MP Mold cast slugs? Thanks!
If you are taking about .25 ACP slugs, the answer is yes.
@@gregorkamensek3923 .25 ACP slugs ? I was talking about the roundnose boat tail slug mold you designed. Have you done any testing ? Hope to see your video on this soon. Tq.
@@brokenarrow61 Ah, OK. Yes those fit in the magazine but I do not recommend them for Prophet or and other PCP that pushes the slug in the barrel... They are quite large. If you size them, then it is OK. I am working (with MP molds) to have a mold for modified .25 ACP slugs for airguns. Those would be hollow point and slightly lighter. 48 grain is a bit much for Prophet and even more for most other guns...
I got the high power 25 cal Prophet, I do not think I need to buy another gun, This is the one for me,
Not sure I understand the question... I have too many guns in my closet, that is all I can say :)
Ted Bier would be proud of you 😉
Thanks for sharing this information! 👍
Hi Gregor, have you find a way to make the Prophet more quieter? Even a silencer is still pretty loud.
Unfortunately, I will not be of much help here as we are not allowed to use suppressors in Slovenia :(
@@gregorkamensek3923 Well that is exactly the reason I am asking... Do you have any other solutions or ideas, than a silencer. Reason for asking is that my friends FX Impact Mk2 is much quieter dan the Prophet, even without a silencer.
So I thought maybe they use a better material for the shroud in the FX?
@@ronaldkonings8117 Slovenia (where the gun is produced) has restriction about this (as I mentioned) but I am trying to convince them to put more effort into this for the international market so I am hoping they will work on this.
But yes, the Priest does not have any baffles to dampen the sound and the shroud is not much longer than the barrel...
For any calibre pcp would it be better to set your regulator at high pressure but use your hammer spring tension to increase/decrease your fps as required?
Depends on what you mean by better... but general answer would be NO. Also, this is not possible with pressure assisted valves. The only reason why it would be better is because of air consumption and in some cases, it can give better accuracy because there is less pressure behind the pellet once it leaves the barrel. But there are a lot of problems with this setups such as velocity inconsistency, requires much higher regulator precision, you have to top up the gun sooner,... So it is always best to be close to what the pressure enables - just under the max velocity.
@@gregorkamensek3923 hi i am still quite new to pcp. I bought a .177 pistol/carbine with 10.6 inch barrel unregulated shooting 8.7gr @ 720-740 fps out of the box. I wanted to buy a regulater being sold to install. There is no pressure gauge on it and i have to request them what pressure i want it set. It is then installed on to the air cylinder looking like a few inch cylinder extension. would like to shoot 9.56gr at about 840-860fps. The regulator comes with a 33cc plenum.
The settings can be between 90 to 150 bars as per request.
@@Lucas-ix8bgI assume we are not talking about RTI gun here so I will not be able to help. I could only help you if I knew the gun you have in extreme details which I do not (and I will not even if you tell me a model and brand)... Also, you are requesting higher velocity with higher pellet weight once regulated. That might not be possible and even if possible, it will reduce shot count significantly.
@@gregorkamensek3923 yes i have realised that the pcps are complicated machines even though the mechanism looks simple. Thanks for taking your time to respond. GBU
Hi Gregor i want to ask an info about refilling the bottle with externar regulator optional as you have installed. Do i need to refill it when it is installed in the stock or i can fill it apart and than install in the stock? My issue is can i buy a pair of bottles and changes on fly when i am out with the carabine?
Unfortunately no, you have to have it in the gun as externally adjustable regulator does not have one way valve so it will dump air out if you unscrew it form a gun. There is maybe a way to put the regulator to 0 bar but I would not advise to use this option...
@@gregorkamensek3923 how is the max setting of the spring in term of turns from flat position? I mean the setting you dont suggest in any case to push it over.
@Massimo Piccioni the tipping point (were you go over max. power for the particular pressure with increasing hammer spring) depends on pressure. At lower pressure, you will reach that point sooner and vice versa. This is also why RTI does not limit this adjustment because if they limit if for example for 150 bars, then you would not be able to even reach max. power at 170 bars...
What kind of maximum FPE can the prophet generate in a .30cal setup? Considering selling my Leshiy 2 and picking one of these up.
I have just done a fast test with 68 grain slugs from ZAN and I got 250 m/s at around 180 bars (that is just over 100 fpe)
@@gregorkamensek3923 Hello Gregor,
Some great tuning that is, reaching 250 ms wit 68 grain.
With reg at 180 bars using the ZAN 49 grains it reached 256 ms (priest 2 performance version).
With ZAN 45.5 grains it reached 265 ms. Nielsen slugs performed the same.
At 180 bar springtension is set at about 9mm.
My question how did you tune it to shoot that fast with 68 grains, are the ports different on the priest2 vs prophet?
Or do I need another spring or something?
Thanks in advance
Or are those results with prophet2?
@@JV-rg1udPriest2 should be the same as Prophet. Aside form pressure, weight of the hammer play a big role and hammer spring tension of course.
@@gregorkamensek3923 Hi Gregor, thanks for the reply. I just ordered the prophet performance spring. I was thinking of also ordering the prophet hammer, but i wasn't sure if the hammer that came with the .30 cal priest2 isn't already that hammer. It looks the same, as far as weight concerns i'm not sure. Do you have a suggestion on which way to go with the hammer? Thanks.
Hello will this regulator if you turn it up to much will it go over the uk legal limit ??
You should ask RTI about that.
Hello Gregor ,
When I shoot ,there is little blow of air coming out of the hammer ,is this natural?
It is the Prophhet Performance.
Are you sure it is form the hammer?
I would assume it is either form the screw that holds the barrel or pellet pusher or even around the barrel. Anyway, if it is form the barrel then you need to replace the o-rings on the barrel, same with pellet pusher. It is normal to have some air escape form the screw, but if it bothers you, you can use some blue thread lock, just put it on the screw and screw it in...
@@gregorkamensek3923 yes air comes out of the hammer area ,just below the pellet probe.
I tested the barrel and pellet probe and there is no air at all.
But as you just helped me now,RTI members told it is natural as you said.
But I set my pressure at 140 bars ,when I shoot , it comes down to 130 bar and it seems to stay there during shooting which means I need to compensate that and raise it to 150 bars ,in this way ,I can get to 140 bar,what do you think ? Is this natural too?
Iam interested to show you my group here it is ,have a look pleaseinstagram.com/p/CEnyoGPhkpn/?igshid=1bnrup0kw6tsl
@@weirhauch1002 it is normal, yet. After setting the pressure by regulator screw, you need to take a few shots and then repeat adjustment if the pressure is not as you desired. It is quite topical that the pressure goes up too much and then settles down when you make a few shots.
@@gregorkamensek3923 thank you qnd I hope you loved the group I put above this comment.😁😁👍
Hola buenas noches, quiero hacerle una pregunta como se cuando una válvula esta deteriorada o mala me e comprado un prophet ll y no se si la válvula este funcionando bien porfavor
If the valve does not leak, then I don't see any reason that there is something wrong with it. Did you notice any anomalies? Is the power not appropriate in relation to the reg. pressure?
yes, the truth is that I think I have to get used to how the rifle works, it is because I have never had one with a plenum box and regular power at this level, what I have doubts about is only when the air passes through the plenum box, sometimes it takes longer to pass air towards it, I have noticed it when under power for example at 90 bar it takes longer and when I go up to 130 or 150 bar it is nothing that takes time to fill the plenum, that is it, on the page it says that it only takes 1ms but it is not the same When lowering the power I don't know if I'm doing something wrong.
@@charlesronaldfontealbasagr1826 It is normal that the plenum fills back up quicker at higher pressure but it never fills up during the fire cycle so this does not affect the valve operation in any way. Also, at lower pressures, the valve is opened for longer time so it drains the plenum slightly more, that is also partially the reason why the plenum fills up slower... The 1ms you saw on the web page is referring to the valve opening time and has nothing to do with plenum refilling time... Just a side note: slower regulators (longer refiling of the plenum) is better in terms of pressure accuracy as during refilling, there is also thermodynamics transient phenomenon to be taken into account. Anyway, I assume that your valve operates exactly as it is supposed to...
@@gregorkamensek3923 ok, thank you very much for helping me on this issue, now I am calmer that the rifle is working normally and that it is fine.
@@charlesronaldfontealbasagr1826 👍
Great explanation of how tune the Prophet Gregor, now explain to us how to convince the wife to put out that much money on an airgun. :-)
That my friend you will have to do yourself :)
L,p
@@gregorkamensek3923 l,p
, ,,p,p.pppp,p,
,p
What makes it one of the most accurate rifle? Is it the barrel or the tune ability?
First of all, not to make anyone angry, I said that it is the most accurate gun I ever used / owned :)
But yes, it is the barrel along with adjustability. There is quite a few pellet guns that achieves this at closer range , but when you get to 100 + yards, they loose the accuracy. Plus given the fact that you can shoot pellets at extremely high velocity at longer ranges, it makes it less sensitive to wind as conventional pellet guns shooting at conventional speeds (up to 900 fps). I will have some videos soon shooting 2,5 cm target at 102 m (111 yards) soon...
Maybe with the screw in the stock would be better to "unpressure" no? On mine i do it with screw not with shooting. Much quicker, only i need a alen key.
That is also an option of course. But I would still suggest shooting as the bleed screw is not intended to be retighten under pressure and it might destroy the o-ring and start to leak after a while.
@@gregorkamensek3923 that i didnt thinked about ... good to know about this "risk", thanx
Hola seria posible este video en español Por favor lo agradecería mucho Gracias Saludos
Sorry but I don't speak Spanish :(
Si por favor 🙏 no se entiende nada
hello Gregorio bought a Prophet Cal 5.5 ... I'm Italian I saw your video where you explain many important things about the Prophet. as I don't understand your language I ask you very kindly if you could give me some advice and explain how I can best use this rifle. .. that is how can I bring it to the power of 80 jaul? fit a loterwalter rod? do you think you advise me to put the pressure regulator? and apart from the loading lever, what difference is there with the Priest 2? give me more tips to shoot with this high performance rifle ... thanks roberto
I have a 30 Cal Mk1 Priest How do i increase the power is it the same as the prophet or the mk2 Priest
Yes, it is the same but you do have somewhat smaller transfer port so you will not get as high power as with mk2 or the latest Prophet...
@@gregorkamensek3923 what can i do apart from drilling it out to the same as the Mk2 / Prophet
@@edgarmaynard5835 Maybe I can suggest you to purchase only the body of Prophet / Priest... You can also increase the pressure, hammer weight and hammer spring, but you will always have the air flow as a limiting factor...
@@gregorkamensek3923 thanks for the update i will have a think about it . I got the Mk1 back on song it was the sound mod that was the problem with accuracy
@@gregorkamensek3923 Dober večer. Imam Priest2 z regulatorjem tlaka in nastavljivo vzmetjo na zalogi. kaj bi zaslužil, če bi zamenjal vzmet s težjim in težjim kladivom? Hvala vam. Imej lep večer.
Mr Gregor. On my prophet in order to reach the same velocity you have reached of about 1040 fps I have to put reg pressure at 180bar but the hammer spring at about 7.5mm. Do you think thats too much considering you have reached same speed with only 5.7mm hammer spring.
Also I cannot tune it the way you explainned on going about 30fps above desired speed then go down with hammer spring 30fps to get good efficiency. To reach 1040fps the max my prophet can go is about 1050fps and no more so if I want 1040fps I had to go 1050fps and then go back with hammer spring to 1040fps. I hope this is clear me trying to explain.
For best accuracy/consistency what's better, higher hammer spring to barely reach speed or higher pressure and go down in speed with hammer spring?
If it works, it should be OK. RTI had used few different options regarding spring so it is possible that mine was different. Regarding velocity it is also OK. My suggestions are a guide but there can be some differences form gun to gun. The important is that you get the correct power and accuracy.
Brother, can i use slugs in RTI Priest2 .25? Pls advise
You can of course. You can use slugs in all RTI guns. The only thing that RTI is saying that RTI Long Range pellet barrel is designed for pellets. I have report of some people that the get good results using pellets even in those barrels. All other barrels in RTI guns are conventional airgun barrels so they should shoot slugs reasonable well.
Sorry, typo: I have report of some people that the get good results using SLUGS even in those barrels. :)
@@gregorkamensek3923 🙏💓
@@sohospice2731 With the 5.5mm .22 long-range barrel I am getting acceptable grouping at 40m with lighter around 25gr h&n and patriot.
@@riaandewinnaar5040 🎄🤝🙏
I’m still waiting for that last video about the high power tune of the matador R5
Yeah, I have problems with accuracy... :(
Please, activate the Close caption or subtitles...thanks.
Can i ouder from another country of myanmar
Hello Gregor I have a problem with the adjustable regulator on my Prophet Performance. I was shooting several months at 160 bar shooting the JSB Monster Redesigned at 300m/s.
Today I changed the regulator to 90 bar to shoot lighter pellets.
The problem was that the speed dropped each shot
See the results
Ie serie 2e serie 3e serie
293 m/s 304 298
281 297 288
272 289 277
267 276 268
257 271 264
255 268 261
254 261 253
252 275 255
249 266 251
249 280 253
248 270 256
264 248
The regulator kept steady at 90 bar.
Then I tried at 120 bar, now the problem was that the speed klimed at each shot
Speed rise 267, 272, 269, 281, 282, 280
After 5 min the speed dropped again to 26s m/s and then began to rise again.
261, 270, 280, 281, 285.
At 130 bar the same problem
259, 266, 274, 279, 282, 286
After 5 min
263, 272, 279, 278, 280, 283
I took 50 shots before I started measuring with the crony.
So at 90 bar the speed is dropping and at 120/130 bar the speed is rising.
All the time I was shooting the monsters the speed was consistent 300m/s.
Any idea what the problem could be?
Problem solved, a new regulator. 150 bar, hammertension 7,5 mm jsb monster @300m/sec.
@@fuselman91 como dices que el regulador lo reemplazaste por otro nuevo, que le ocurrió al anterior ?
@@charlesronaldfontealbasagr1826 English?
@@fuselman91 You say that you replaced the regulator with a new one, that's what I understood, what happened to the previous one, sorry, my English.
The dealer could not repair the regulator so he send to RTI and got a new one. Was warranty .
👍👍
Thật là tuyệt vời.ở Việt Nam tôi không có loại này.
✌️
The regulator is creeping. ua-cam.com/video/UdKx4-59VVU/v-deo.html -> 130 bar, and ua-cam.com/video/UdKx4-59VVU/v-deo.html -> 140 bar.
Отдельно такой редуктор www.rtiarms.eu/reg регулятор купить можно?
Yes
@@gregorkamensek3923 как? и какая цена?
There is no sound repeat there is no sound