LRB 370: Dial your riflescope
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- Опубліковано 15 чер 2024
- Learn windcalls & how a BDC really works...
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Toppen film!
Thanks for another wonderful episode. All the best Thomas. I look forward to the next. I hope to apply what you are teaching in the meantime. Best regards Ruan
Many thanks, hoping to have the next episode out soon. Best wishes for the summer!
Been following you for years. Always excellent content and the scenery is pristine! Keep up the good work!
Much appreciated! Trying to push out a complete series before the season is upon us.
I bought a K31 that came with messed up iron sights. Instead of replacing the front post, I brought it back to specs with a hand file and calipers. I drove to the range and hit bullseye at 300m on the first shot. Doing the math is part of the fun and a good mental exercise!
Impressed!
Just awesome! Thank You!
Regards,
Denis
Thanks, glad you liked it!
A tip for you Thomas about the scope mount if you have problem with locking arms on the sadel mount loosening up after many shots ,,take of the scope from the barrel ,turn the sadel mount upside down, on the underside you have a hole (aprox 2,5mm) where the axel from the locking arm is rotating when you open and close ,put a drop of locktite in the hole and spinn the axel a couple of turns back and forward so the glue sticks around the axel ,then put the scope back on your gun and lock it in place and let it dry for a day ,after that it should not open by itself.
Already tried. It also has set-screws to lock the tension. But still keeps losing torque, so the mount has been abandoned.
Superb 😎
Thanks, working on ep 371 now
Great video as always sir! I still don’t like those European scope mounts. I would always be Messing them up. I must have bolted and nut system. Just me I reckon.😎👌🏻 wonderful temperature. Perfect!!
It's certainly a new fear unlocked for me. I have a preference for picatinny, just for the simplicity of it.
I’d be interested in knowing how often you clean your barrel ?
Also do you keep a record of the first shot you fire each day , and does it sit inside the group of following shots .
In other words , do you see a cold bore POI shift with your rifle .
Ken
Hi Ken. My coldbore shot is usually at the >500 target and it's only elevation I can really see a impact change - non detectable outside shooter error. At 118 it all goes into the same group. I patch oil in, brush appr 15x, dry patch 3-4 times and then stop a patch 1 cm from muzzle. If I see salmon pink in bore, I use copper cleaner. If not, patch w oil. That's it. My barrel is almost always "same" dirty and more thourough cleaning is rare. I'll make a film about it
Thank you for replying to my questions.
It would be great if you could make a short video on these subjects.
The reason I asked about the cold bore shot is that I believe most of the time the biggest reason for a cold bore POI shift is a “ cold shooter “ not the cold bore .
Ken
Thank you!
No problem
Awesome as always thomas very informative i was going to ask the question about ambient pressure and what swings in pressure will make difference on bullets impact as alway keep getting after it mate 👍
More about this later, but in general most shooters/hunters will have a limited range due both geography and open season. For these shooters a BDC makes a lot of sense as you can really narrow down the conditions (inside a window of 100 hPa and 20°C) so with a calibration set to relevant values, you can use the BDC most of the time without needing to do any modifications. In real life, you need the combination elevation changed more than 500 meters AND shooting range more than 500 meters before you need to do anything other than dial-to-range.
Dont kno if you have a video about it, or if you are interested to make a video about it. But would be fun so see you make a video about the difference between high quality ammo and normal cheap 100m ammo? Hilsen Jarle
That's already filmed.
@@THLRprovide him the link….
@@mikemc330 the film is not edited yet
👍Italia
Good luck with your season!
Hey Thomas I suspect you've talked about it in the past past but I must have missed it, how do you establish what makes a significant difference in meteological conditions? I'm trying to build my own balistic charts based on the ideas you discuss. My guess is conditions that make x mils of difference at range y. But I'm wondering if maybe its x cm of difference at range y although I realise that works out as the same thing..... For instance I'm comparing a particular configuration and altering the temperature (only atmospheric for now) and I see it goes from 7.5 mil @ 800m @ 5c to 7.3 mil @800 @25c...but thats roughly 19cm difference
I haven't touched that subject yet. There's a full explanation in the 2016 film vimeo.com/ondemand/langhallsskytte2. The mining process for that data takes about 1 hour, here's how to do it: Print out your reference trajectory, 100m increments. You want to examine from 400 and as far as you intend to shoot. Start at range 600, for simplicity we state 4.0 mrad or 40 clicks for that range. Change range increment to 1 meter, change the airpressure 30//40//50 hPa up & down from calibration value, calculate trajectory table. Examine where reference value 40 enters and exits; let's say you went UP 40 hPa and 4.0 Mrad appears at range 573 and exits at 592. Record that data (600-573)= 27 and (600-592)=8. Do the same for temperature, use default V0 correction 0,3 msec per 1°C change. I suggest 10°C change first prod. Adjust your temp/hpa values for equal "steps" OR replace the process with a single DA number if you have a tool for showing that. Back to 27and 8 - these numbers means that ANY number between 27 and 8 will effectively give you the correction needed to reach 4.0 mrad or, reversed, the range 600 meters/yards. So 8 to 27 is your window. Even though your windows will be different throughout the trajectory or between the variation values, you just need to arrive at a number that will go into the window. Once data is mined and you check the simple method against the app calculation, you'll see that there is none or next to none (decimal deviation) between the two results as the scope defines your resolution (1 turret click)
@@THLR Thanks! Not sure I understand you right now. But What I think I am getting is that you focus on the horizontal change for a given click/mil rather than the mil/click for a given horizontal. But I'll start crunching the numbers and see if it becomes clear as I go. And I'll grab that film. Thanks for all your tips.
🙏🏻🇫🇮🙏🏻🇫🇮🙏🏻
Thanks, next episode should be slightly better...
@@THLR nothing wrong with this one🤝🏻
#Shouldhaveboughttikka 😜
🤣 actually, a Tikka T3, good stock and Spuhr hunting mounts would've been my setup if starting from scratch today (and not buying secondhand)