Thank you for doing such an informative video. This is exactly what I was looking for when comparing the two methods. I also appreciate the fact that you are using dial calipers rather than digital.
It's worth noting that the Hornady comparator attaches to your calipers via an offset cut slot, with set screw holes on either side. One side is designed to be fairly close to centered on the caliper blades. The other is designed to be offset for use with the Hornady overall length gauge, which holds the modified case in a way that won't let you get your calipers perfectly centered. Also, to tackle the case tilt, I'll usually rotate the case in the tool a few times till it sits true. It's not a perfect design, but it's decent enough to get useable results. Another method to combat caliper inaccuracy is to pinch on the backs of the blades, instead forcing the thumb wheel. Cheaply made calipers tend to flex when you try to rely on the stiffness of the tool. The very annoying thing about this tool for me is when the case head gets slightly deformed and won't sit true. This is really common with Federal 223 brass. I'm convinced Federal brass is made of play-doh. Thanks for the video!
Dustysa4, Absolutely correct in what you say. It seems that there are very few of us that actually know how to use this Hornady comparator correctly. For the life of me I don't know why people cant see what the offset on the base holders for the comparator inserts and the offset on the anvil base are actually used for. All you have to do is make sure that you are using the holding screw in the correct offset side of the comparator base and anvil. The different offsets will either align the comparator on the caliper so that the cartridge and or the projectile is centered with the blades or when used with the Hornady length gauge tool it is supposed to be used as an offset. The best instruction on how to use this comparator correctly is here, it shows how the offset is used : www.americangunreview.com/2012/06/hornady-lnl-comparator-set-review.html
You can center the comparator body by moving the thumb screw to the other hole.... that hole is supposed to be used when measuring CBTO when using the modified case measuring tool...
you have me leaning towards picking up an RCBS tool or two in the future I think. for me what helps align the case head between the blades is to lightly spin the case while closing the calipers slowly and it tends to align with minimal effort.
Neil Harris - I've been thinking about getting the anvil for that Comparator. Somehow, I just don't trust the Comparator anywhere as much as my Precision Mics - but the Comparator is not expensive - I should really work with it more since other shooters such as yourself have had success with it (the Comparator / caliper is an awkward thing to use). I first became aware of the Precision Mic advantages when I was in High Power Competition shooting back in the 80s and early 90s. Best to ya, FC
Thanks for your videos, well made, very helpful in understanding the use of the instruments.
6 років тому
With the Hornady comparator, the device is offset on the calipers enough that the case head alone will rest on the jaw of the caliper after a few spins. The case will settle in and a consistent reading can be achieved. A small amount of die wax or case lube on the shoulder of the case will make the spinning smoother.
The Hornady tool has a small built in error because of the small edge break (chamfer) on the edge of the datum bushing bore. You can over come this error by setting the Hornady tool using a gunsmith's chamber headspace gauge. Just insert the gunsmith gauge and set the Hornady tool to the number marked on the gauge. I have compared a properly zeroed Hornady tool measurement to the same measurement taken of a case with a fully calibrated 50" optical comparator at 20X magnification. The 2 measurements were exactly the same. The measurement was for a 6.5X53R Dutch Mannlicher fired case. You cannot get any sort of case gauge for this obscure and long obsolete round.
crossstimbers2 - Either the HC or the RCBS PM work better the more understanding the users have on their instruments. But both are much better than flying blind with FL sizer dies adjusted by hither and yon "touch the shellholder" to "1/4 turn more". Thanks for boosting the goodness of the Hornady Comparator.... Best to ya, FC Steve
FortuneCookie45LC. Agreed these tools are a significant improvement for setting FL dies exactly where they should be. If you size too fast or with not enough lube it will leave the case longer by .001 or .002. These tools will detect those tiny variations due to variations in technique. Thanks for the very useful video.
Why can't I find a good video on how to use the RCBS percision mic for bullet seating depth? It's a great tool but I'm haveing trouble getting the right seating depth.
The back of a standard she'll holder works as good as the Hornaday comparator. Either way the anvil base sold seperately positions the case much better than the narrow edge of the calapers. I use my digital calapers so I can zero the calapers in the closed position... nice to see that my dial gauge calapers works just as well.
Firetip - Indeed, I've found that having multiple calipers is a very good thing. I keep a caliper set up for use with the Comparators and another one for my case measurements, etc. I intend to do a video on this in the future. Why keep shuttling those things off and onto my caliper? They aren't that expensive anyway. Best to ya, Steve
It seems that the biggest difference between the two, is that the rcbs mic gives the actual measure relationship of a chamber to the SAAMI minimum headspace spec. You didn't say if for the reloader, there is any value to knowing that data. Is there? If not, seems the more versatile and less expensive Hornady would be the instrument to get?
David Cavallero - Both work. And either is much better than simply using our FL sizing dies without any regard to what is actually happening. Because what we are doing is assessing the headspace from our fired brass and then bumping the shoulders back a specified amount, the Hornady Comparator works as well as the Precision Mic. But the PM is handier and readier to use. It's a matter of preference since the difference in cost is negligible when amortized over many years. We can save in other areas, like collecting range brass for our handgun shooting, or buying powder and primers in bulk. Have a great day, FC Steve
more repeatable with the rcbs unit but more costly, like fortune cookie says with use and knowledge the hornady is about the same, just not as easy to get accurate results unless proficient with it.
Which one of these would be better for resizing/hand loading 7.62x51 Nato rifle brass? There is too much controversy over the comparison of these two rounds and from what I see, they are NOT the same because of the head space. The builder of my BM59 said not to fire .308 and he would not warranty his work for that, to only fire 7.52x51 Nato, which is what the rifle is chambered for. I have the head space specs for the Nato round but have not measured the HS for my rifle.
jason60chev - As you know, the outside dimensions of both cases are identical. But the military brass has more brass thickness internally resulting is slightly less case capacity. Many military chambers are on the long side of SAAMI specs so brass stretching, esp with semi / full auto, can occur. This is seldom a problem with the stronger military brass intended for one firing only. Your builder doesn't want you taking your fired and stretched brass (esp commercial weaker brass), and randomly FL sizing it back to minimum SAAMI, stretching it again...and perhaps again = case separations. What he really should be telling you is he only warrants for using military factory ammo. Even reloading military brass can be a real problem if headspace is handled in a random manner with the FL sizing dies we have. Shame as if your BM59 chamber is not over lengthed, it could be a very fine rifle to reload with any of our good commercial 308 brass including the fine Lapua. You should get more information from your builder who should be more than happy to explain why his policy plus how to help you reload for the rifle (providing he encourages that reloading). At any regard, congrats on your fine rifle... Good shootin' to ya, FC Steve
Dang , I knew you were good but . In my mind the Hornady Comperator is the ticket for rimless auto/semiauto computations . Obviously the R.C.B.S. micrometer headspace gage is for blueprinting rounds specific to chambers and can be used finding your ballpark on semi/autos . It's according to what you think is needed returning from the range , or in competition at the range . Picked up a well used Kel-tec charley and not much afraid of it but an untried 22/250 I may not feel so comfy . Thanks be
Venerable one. It seems to me that I could use the bullet comparator rings to do a reasonable comparator function. They are not as long but have several similar diameters. Is there a down side to this? Just a suggestion from my Scottish heritage ...
I do not like the Hornady Comparator (Compa-Rater)... it gives me inconsistent results... consistently. Concerning the RCBS Precision Mic... I never see anyone talk about “zeroing” it. I have several of these gauges and I found that when using a SAAMI Spec blank case, the 22-250 does not indicate “zero”, but rather +one thousandth. So when I use it to measure my cases, I have to deduct that fudge factor from my calculations. Especially so when wearing argyle socks.
New to this but the Hornady product does not index to the datum line for headspace for all calipers. It occasionally will coincide with the same diameter but you can not say for all. 308 is unique because I believe the diameter of the datum is .400 which happens to be one of the hornady "fittings". If you were to use this same "fitting" now on a 300 win mag, having a datum diameter of .420 you would be off by enough that you should be concerned. Be careful, and understand the limitations of your tools.
Douglas Ball - Since I use my Precision Mics, I really don't use the Comparator. The Comparator for headspace setting is not the best way to go as it takes a great deal of practice in its use before reliability is achieved. I invested in it to see if it would serve me, but I'm not sold on it as of now... Have a great day, FC
like I said above FC they don't make them for all calibers. you got what you got. too bad the companies don't make this stuff for us only their pocket books and if you are not shooting the standard .308 and others you are screwed. Like the Hornady overall length gauge. I have to make my own cases because they don't carry wild cat cases. like the 375 JDJ or 7mm TCU
RCBS "precision" case mic is marketed to be calibrated at saami spec. Unfortunately they are all over the place. The last one I got zeroed on a field gauge (+ 6 thou). I put some factory ammo in it and the readings averaged 6 thou under saami min. It's a glorified comparator with no real reference to saami and it went back to midway. I have heard of them being as much as 15 thou off. Wilson case gauge/case gauge micrometer is the way to go if you want to work from a reference.
very nice to know, am not surprised, would be interesting to know if they were more accurate years ago, and are just being produced on worn out machines but either way grateful for the info, was just speculating on purchasing some, will no longer worry about it.
First, thanks for offering the RCBS Precision Mike to the new reloading public as a useful tool. One statement you made is not quite correct. The RCBS Precision Mike is somewhat caliber specific but not totally caliber specific. The .243, Remington260, 7mm-08, .308, etc., calibers can use just one RCBS Precision Mike to make shoulder measurements or "case head space" and be ANSI, SAAMI, correct. The reason is that this .308 case body is the parent of these other calibers (actually 8 calibers total). I have used the .243 marked mike for .308 caliber for years.
Cc Wynn - Right you are, and the 30/06 can be used for 25/06 and 280 Rem also as I recall. Drat, Google has made it difficult to add annotations to the videos as we did before (if endscreens are used, annotations cannot be used), I'll have to do another video with my 6mm Rem Precision Mic and mention it there... Best Regards to ya, and thanks for posting... FC
Cc Wynn That is exactly what I do! I set my full length sizing die to just "bump the shoulder" enough so I have between one and two thousandth of head space when using the RCBS mic. If my fired brass doesn't need any bumping then I just neck size. Thanks for confirming what I have been doing for awhile!
The RCBS Mic maybe good but like a lot of these companies they don't stay up with the times (reloading books for sure). Want one for the 6.5 Creedmoor. very popular with precision shooters. But RCBS doesn't think they need to have one for that. God knows how many other calibers they don't make it for. Hornady is all we have. And some say it isn't as precise as the Mic. Mic is only as precise as the calibers they make it for.
Michael Andersen - You could really benefit by having a Precision Mic for your 6.5 Creedmoor. Unlike 260 Reminton owners who can use the 308 Precision Mic readily, there is no Precision Mic for the 300 Savage. If the 6.5 Creed was chambered in a popular bolt action, there would be a strong drive for RCBS to make the 6.5 Creed Precision Mic... You will note that all the many calibers the Mic is made in are bolt guns. The 300 Savage was a lever action cartridge to begin with and never really crossed over into bolt guns. You'll have to make do with the Hornady. Your 6.5 Creedmoor is actually very near the 260 Rem. Best to ya, FC
hornady comperator sells a kit with 14 guages i own 223 rem, 6.5 creed. 270 win and 300 win. and this kit wont work for any of them, so ya that kinda SUCKS
After watching this video I was very interested in buying one of these RCBSPM I already have the Hornady Headspace gages I use with my caliper. However, after viewing all the negative comments on Amazon about the quality I guess I will keep using the Hornady. You would think RCBS would not allow cheap working products like this.
Regardless of comments on quality or not, there is no reason what so ever to change from the Hornady (or similar) comparator. The RCBS mic is really only good for accurately measuring a case for comparison to SAAMI spec. As a case to case comparator, it is honestly a big time waster more than anything (obviously this also depends on how many cases you're checking out of a lot that you might be dealing with). Sure, the regular caliper based comparators can be a little finicky at first, but once you get the hang using them right and get a rhythm going, you can accurately check a lot of cases fast. As a matter of fact, I just resized a lot of 50 pieces of brass last night and after resizing them and wiping on the wax residue, I checked all 50 in about literally 3 to 3-1/2 minutes and I guarantee you that the level of accuracy as a "before and after comparison" is no different than what you would see with the RCBS mic.
Hello, I mean no disrespect to FortuneCookie45LC but the truth is to buy the Precision Mic which is hands down the easiest and most accurate to use and he forgets to mention that the kit comes with a free bore tool to determine the bullet seating depth too. Very bias comparison, and when accuracy and safety are concerned being cheap isn't the correct answer. You possibly will be handloading for many years so the Precision Mics cost is minimal for the great job it does.
MB - Yes indeed, that is the advantage of the Comparator vs the PMics although a 30/06 PMic is good for the 280 Rem, 25/06 etc. Have a great day, FC Steve
@@FortuneCookie45LC I have used a 9mm case to head space different caliber for years. I have now bought a Hornady sett, and there is no difference. Head space is the same.
@@FortuneCookie45LC You can square the Hornady comparator gauge and body on the caliper blades. This is accomplished by reversing the set up on the body of the tool to the backside of the caliper blade. Instead of the set screw facing the user, turn it, or reverse it to the backside of caliper blade. Try it, you'll like it.
I'm sorry to be nit-picky, but it's not pronounced COM'-PER-AY-TER. The correct pronunciation is CUM-PAIR'-UH-TER... not like the word "compensation", but like the word "compare".
I hope I didn't offend. I just wanted to help. I'm guilty of mispronouncing plenty of words and it's embarrassing when I am corrected but in the end, I appreciate it as it helps me avoid mispronouncing it in the future. Great video, by the way. 😁
Sean Foster - No offense at all - it just reminded me of when I mispronounced Exodus in the sixth grade...I was the top student in the class at the time when I did that, and this one classmate was actually beside himself with laughter...but I wasn't laughing.... Best to ya, FC
WOW!!! The device is called a 'kuhm peh ruh tr' (verfied using Google) not 'compa raytor'! Also you didn't say which nut you used to check the dimensions! Very poor video of how to use the RCBS gauge and you didn't even show that the caliper needed to be zeroed before using the Hornady "compa ray ter" gauge. I'll be looking for a another video that demonstrates the use more accurately!
Thank you for doing such an informative video. This is exactly what I was looking for when comparing the two methods. I also appreciate the fact that you are using dial calipers rather than digital.
It's worth noting that the Hornady comparator attaches to your calipers via an offset cut slot, with set screw holes on either side. One side is designed to be fairly close to centered on the caliper blades. The other is designed to be offset for use with the Hornady overall length gauge, which holds the modified case in a way that won't let you get your calipers perfectly centered. Also, to tackle the case tilt, I'll usually rotate the case in the tool a few times till it sits true. It's not a perfect design, but it's decent enough to get useable results. Another method to combat caliper inaccuracy is to pinch on the backs of the blades, instead forcing the thumb wheel. Cheaply made calipers tend to flex when you try to rely on the stiffness of the tool. The very annoying thing about this tool for me is when the case head gets slightly deformed and won't sit true. This is really common with Federal 223 brass. I'm convinced Federal brass is made of play-doh. Thanks for the video!
Dustysa4, Absolutely correct in what you say. It seems that there are very few of us that actually know how to use this Hornady comparator correctly. For the life of me I don't know why people cant see what the offset on the base holders for the comparator inserts and the offset on the anvil base are actually used for. All you have to do is make sure that you are using the holding screw in the correct offset side of the comparator base and anvil. The different offsets will either align the comparator on the caliper so that the cartridge and or the projectile is centered with the blades or when used with the Hornady length gauge tool it is supposed to be used as an offset. The best instruction on how to use this comparator correctly is here, it shows how the offset is used : www.americangunreview.com/2012/06/hornady-lnl-comparator-set-review.html
I believe it's pronounced Come-pair-uh-tore(comparing) and I need one. Thanks for the video and great explanation of the two.
You can center the comparator body by moving the thumb screw to the other hole.... that hole is supposed to be used when measuring CBTO when using the modified case measuring tool...
just one more thing I thought I didn't need until i watched this
you have me leaning towards picking up an RCBS tool or two in the future I think. for me what helps align the case head between the blades is to lightly spin the case while closing the calipers slowly and it tends to align with minimal effort.
Neil Harris - I've been thinking about getting the anvil for that Comparator. Somehow, I just don't trust the Comparator anywhere as much as my Precision Mics - but the Comparator is not expensive - I should really work with it more since other shooters such as yourself have had success with it (the Comparator / caliper is an awkward thing to use). I first became aware of the Precision Mic advantages when I was in High Power Competition shooting back in the 80s and early 90s. Best to ya, FC
I have both gauges and find there is at least a .004 difference between the two gauges measuring the same case ? WHY ?
My cases were deprimed
Thanks for your videos, well made, very helpful in understanding the use of the instruments.
With the Hornady comparator, the device is offset on the calipers enough that the case head alone
will rest on the jaw of the caliper after a few spins. The case will settle in and a consistent reading can be achieved. A small amount of die wax or case lube on the shoulder of the case will make the spinning smoother.
Can of Beans - The anvil also really helps square up everything for more consistent measures... Have a great day...FC Steve
FortuneCookie45LC
Yes Sir, I'm certain it would. I wasn't aware of that product but thanks for the info. I'll be getting one soon.
The Hornady tool has a small built in error because of the small edge break (chamfer) on the edge of the datum bushing bore.
You can over come this error by setting the Hornady tool using a gunsmith's chamber headspace gauge.
Just insert the gunsmith gauge and set the Hornady tool to the number marked on the gauge.
I have compared a properly zeroed Hornady tool measurement to the same measurement taken of a case with a fully calibrated 50" optical comparator at 20X magnification. The 2 measurements were exactly the same. The measurement was for a 6.5X53R Dutch Mannlicher fired case. You cannot get any sort of case gauge for this obscure and long obsolete round.
crossstimbers2 - Either the HC or the RCBS PM work better the more understanding the users have on their instruments. But both are much better than flying blind with FL sizer dies adjusted by hither and yon "touch the shellholder" to "1/4 turn more". Thanks for boosting the goodness of the Hornady Comparator.... Best to ya, FC Steve
FortuneCookie45LC. Agreed these tools are a significant improvement for setting FL dies exactly where they should be. If you size too fast or with not enough lube it will leave the case longer by .001 or .002. These tools will detect those tiny variations due to variations in technique. Thanks for the very useful video.
Why can't I find a good video on how to use the RCBS percision mic for bullet seating depth? It's a great tool but I'm haveing trouble getting the right seating depth.
Love your videos. Very helpful!
The back of a standard she'll holder works as good as the Hornaday comparator. Either way the anvil base sold seperately positions the case much better than the narrow edge of the calapers. I use my digital calapers so I can zero the calapers in the closed position... nice to see that my dial gauge calapers works just as well.
Firetip - Indeed, I've found that having multiple calipers is a very good thing. I keep a caliper set up for use with the Comparators and another one for my case measurements, etc. I intend to do a video on this in the future. Why keep shuttling those things off and onto my caliper? They aren't that expensive anyway. Best to ya, Steve
It seems that the biggest difference between the two, is that the rcbs mic gives the actual measure relationship of a chamber to the SAAMI minimum headspace spec. You didn't say if for the reloader, there is any value to knowing that data. Is there? If not, seems the more versatile and less expensive Hornady would be the instrument to get?
David Cavallero - Both work. And either is much better than simply using our FL sizing dies without any regard to what is actually happening. Because what we are doing is assessing the headspace from our fired brass and then bumping the shoulders back a specified amount, the Hornady Comparator works as well as the Precision Mic. But the PM is handier and readier to use. It's a matter of preference since the difference in cost is negligible when amortized over many years. We can save in other areas, like collecting range brass for our handgun shooting, or buying powder and primers in bulk. Have a great day, FC Steve
more repeatable with the rcbs unit but more costly, like fortune cookie says with use and knowledge the hornady is about the same, just not as easy to get accurate results unless proficient with it.
Which one of these would be better for resizing/hand loading 7.62x51 Nato rifle brass? There is too much controversy over the comparison of these two rounds and from what I see, they are NOT the same because of the head space. The builder of my BM59 said not to fire .308 and he would not warranty his work for that, to only fire 7.52x51 Nato, which is what the rifle is chambered for. I have the head space specs for the Nato round but have not measured the HS for my rifle.
jason60chev - As you know, the outside dimensions of both cases are identical. But the military brass has more brass thickness internally resulting is slightly less case capacity. Many military chambers are on the long side of SAAMI specs so brass stretching, esp with semi / full auto, can occur. This is seldom a problem with the stronger military brass intended for one firing only. Your builder doesn't want you taking your fired and stretched brass (esp commercial weaker brass), and randomly FL sizing it back to minimum SAAMI, stretching it again...and perhaps again = case separations. What he really should be telling you is he only warrants for using military factory ammo. Even reloading military brass can be a real problem if headspace is handled in a random manner with the FL sizing dies we have. Shame as if your BM59 chamber is not over lengthed, it could be a very fine rifle to reload with any of our good commercial 308 brass including the fine Lapua. You should get more information from your builder who should be more than happy to explain why his policy plus how to help you reload for the rifle (providing he encourages that reloading). At any regard, congrats on your fine rifle... Good shootin' to ya, FC Steve
Man. You explained and demonstrated both products perfectly! Thank you!
Spin your Hornady comparator attachment 180° with the brass set screw on the backside. Then it should be centered with your caliper jaws.
Dang , I knew you were good but . In my mind the Hornady Comperator is the ticket for rimless auto/semiauto computations . Obviously the R.C.B.S. micrometer headspace gage is for blueprinting rounds specific to chambers and can be used finding your ballpark on semi/autos . It's according to what you think is needed returning from the range , or in competition at the range .
Picked up a well used Kel-tec charley and not much afraid of it but an untried 22/250 I may not feel so comfy . Thanks be
Venerable one. It seems to me that I could use the bullet comparator rings to do a reasonable comparator function. They are not as long but have several similar diameters. Is there a down side to this? Just a suggestion from my Scottish heritage ...
That's what I do .
Which instrument do you use-like the best?
I do not like the Hornady Comparator (Compa-Rater)... it gives me inconsistent results... consistently.
Concerning the RCBS Precision Mic... I never see anyone talk about “zeroing” it. I have several of these gauges and I found that when using a SAAMI Spec blank case, the 22-250 does not indicate “zero”, but rather +one thousandth. So when I use it to measure my cases, I have to deduct that fudge factor from my calculations. Especially so when wearing argyle socks.
New to this but the Hornady product does not index to the datum line for headspace for all calipers. It occasionally will coincide with the same diameter but you can not say for all. 308 is unique because I believe the diameter of the datum is .400 which happens to be one of the hornady "fittings". If you were to use this same "fitting" now on a 300 win mag, having a datum diameter of .420 you would be off by enough that you should be concerned. Be careful, and understand the limitations of your tools.
Douglas Ball - Since I use my Precision Mics, I really don't use the Comparator. The Comparator for headspace setting is not the best way to go as it takes a great deal of practice in its use before reliability is achieved. I invested in it to see if it would serve me, but I'm not sold on it as of now... Have a great day, FC
like I said above FC they don't make them for all calibers. you got what you got. too bad the companies don't make this stuff for us only their pocket books and if you are not shooting the standard .308 and others you are screwed. Like the Hornady overall length gauge. I have to make my own cases because they don't carry wild cat cases. like the 375 JDJ or 7mm TCU
RCBS "precision" case mic is marketed to be calibrated at saami spec. Unfortunately they are all over the place. The last one I got zeroed on a field gauge (+ 6 thou). I put some factory ammo in it and the readings averaged 6 thou under saami min. It's a glorified comparator with no real reference to saami and it went back to midway. I have heard of them being as much as 15 thou off. Wilson case gauge/case gauge micrometer is the way to go if you want to work from a reference.
Thats tragic to hear. I bought the mic to give me a reference and hopefully some confidence in my die setting. Can't say I'm surprised
very nice to know, am not surprised, would be interesting to know if they were more accurate years ago, and are just being produced on worn out machines but either way grateful for the info, was just speculating on purchasing some, will no longer worry about it.
Sinclair makes a great head space mic
If you look at the comparator closely you will see that it does center on the blade of the guage.
depends on which way you install it as many have mentioned same setup is used with the overall length gauge
Sadly, RCBS does not make a precision mic for 6.5 Grendel.
Put the case in the RCBS-mic then take a reading on your calipers with the case in the mic.
First, thanks for offering the RCBS Precision Mike to the new reloading public as a useful tool. One statement you made is not quite correct. The RCBS Precision Mike is somewhat caliber specific but not totally caliber specific. The .243, Remington260, 7mm-08, .308, etc., calibers can use just one RCBS Precision Mike to make shoulder measurements or "case head space" and be ANSI, SAAMI, correct. The reason is that this .308 case body is the parent of these other calibers (actually 8 calibers total). I have used the .243 marked mike for .308 caliber for years.
Cc Wynn - Right you are, and the 30/06 can be used for 25/06 and 280 Rem also as I recall. Drat, Google has made it difficult to add annotations to the videos as we did before (if endscreens are used, annotations cannot be used), I'll have to do another video with my 6mm Rem Precision Mic and mention it there... Best Regards to ya, and thanks for posting... FC
Cc Wynn That is exactly what I do! I set my full length sizing die to just "bump the shoulder" enough so I have between one and two thousandth of head space when using the RCBS mic. If my fired brass doesn't need any bumping then I just neck size. Thanks for confirming what I have been doing for awhile!
The RCBS Mic maybe good but like a lot of these companies they don't stay up with the times (reloading books for sure). Want one for the 6.5 Creedmoor. very popular with precision shooters. But RCBS doesn't think they need to have one for that. God knows how many other calibers they don't make it for. Hornady is all we have. And some say it isn't as precise as the Mic. Mic is only as precise as the calibers they make it for.
Michael Andersen - You could really benefit by having a Precision Mic for your 6.5 Creedmoor. Unlike 260 Reminton owners who can use the 308 Precision Mic readily, there is no Precision Mic for the 300 Savage. If the 6.5 Creed was chambered in a popular bolt action, there would be a strong drive for RCBS to make the 6.5 Creed Precision Mic... You will note that all the many calibers the Mic is made in are bolt guns. The 300 Savage was a lever action cartridge to begin with and never really crossed over into bolt guns. You'll have to make do with the Hornady. Your 6.5 Creedmoor is actually very near the 260 Rem. Best to ya, FC
Look into a "Sinclair".
@@dinohudson1432 true sinclair has a few calibers that hornady gets close to, and fit on the same tool
The head space of a fire arm is as Elusive as gnomes and unicorns. More from fantasy than reality
Com par^ a tor not com^ par a tor. Other than that excellent!
That's why I stopped watching.
hornady comperator sells a kit with 14 guages i own 223 rem, 6.5 creed. 270 win and 300 win. and this kit wont work for any of them, so ya that kinda SUCKS
RCBS give you more than one gauge.I think you get 3.
After watching this video I was very interested in buying one of these RCBSPM
I already have the Hornady Headspace gages I use with my caliper. However, after viewing all the negative comments on Amazon about the quality I guess I will keep using the Hornady. You would think RCBS would not allow cheap working products like this.
Regardless of comments on quality or not, there is no reason what so ever to change from the Hornady (or similar) comparator. The RCBS mic is really only good for accurately measuring a case for comparison to SAAMI spec. As a case to case comparator, it is honestly a big time waster more than anything (obviously this also depends on how many cases you're checking out of a lot that you might be dealing with).
Sure, the regular caliper based comparators can be a little finicky at first, but once you get the hang using them right and get a rhythm going, you can accurately check a lot of cases fast. As a matter of fact, I just resized a lot of 50 pieces of brass last night and after resizing them and wiping on the wax residue, I checked all 50 in about literally 3 to 3-1/2 minutes and I guarantee you that the level of accuracy as a "before and after comparison" is no different than what you would see with the RCBS mic.
Hello, I mean no disrespect to FortuneCookie45LC but the truth is to buy the Precision Mic which is hands down the easiest and most accurate to use and he forgets to mention that the kit comes with a free bore tool to determine the bullet seating depth too. Very bias comparison, and when accuracy and safety are concerned being cheap isn't the correct answer. You possibly will be handloading for many years so the Precision Mics cost is minimal for the great job it does.
Put a go or no go gauge in the "precision" mic and see if it's anything more than a comparator with tons of backlash.
You’re using it to compare not comp rate
These need not be caliber specified, as long as they hit the shoulder it's okay.
MB - Yes indeed, that is the advantage of the Comparator vs the PMics although a 30/06 PMic is good for the 280 Rem, 25/06 etc. Have a great day, FC Steve
@@FortuneCookie45LC I have used a 9mm case to head space different caliber for years. I have now bought a Hornady sett, and there is no difference. Head space is the same.
@@FortuneCookie45LC You can square the Hornady comparator gauge and body on the caliper blades. This is accomplished by reversing the set up on the body of the tool to the backside of the caliper blade. Instead of the set screw facing the user, turn it, or reverse it to the backside of caliper blade. Try it, you'll like it.
Com par a tor.
There’s no such word as (comp a rator) it’s pronounced (compar ator)
I'm sorry to be nit-picky, but it's not pronounced COM'-PER-AY-TER. The correct pronunciation is CUM-PAIR'-UH-TER... not like the word "compensation", but like the word "compare".
Sean Foster - OK, but you should have heard me when I first saw and pronounced the word melancholy. Have a great day, FC
I hope I didn't offend. I just wanted to help. I'm guilty of mispronouncing plenty of words and it's embarrassing when I am corrected but in the end, I appreciate it as it helps me avoid mispronouncing it in the future. Great video, by the way. 😁
Sean Foster - No offense at all - it just reminded me of when I mispronounced Exodus in the sixth grade...I was the top student in the class at the time when I did that, and this one classmate was actually beside himself with laughter...but I wasn't laughing.... Best to ya, FC
WOW!!! The device is called a 'kuhm peh ruh tr' (verfied using Google) not 'compa raytor'!
Also you didn't say which nut you used to check the dimensions!
Very poor video of how to use the RCBS gauge and you didn't even show that the caliper needed to be zeroed before using the Hornady "compa ray ter" gauge. I'll be looking for a another video that demonstrates the use more accurately!
Measuring the accuracy like this is ridiculous and meaningless.