Should give me 1011 fps at 7671 psi of pressure. I initally used the computer software Quick Load to come up with the H4895 load. With the 4.0gr load, case density was at least 50%. Shooting Chrony, indoors with light kit, ~3ft in front of muzzle. High temp up to +392Fīarrel lenth: 14.5" (polished with Flitz then oiled/cleaned/lubed bore) and leaves a VERY slippery coated bullet. RP cases, couple times fired, not trimmed.īullet: 50gr Siearra PSP, LUBED with HHS 2000 by Wurth. PLEASE consider using ALL availible information out there b/4 trying this. As usual, I will provide info on MY particular set-up which may not work with yours. I couldn't wait any more and did it myself. I bought one just to play around with this kind of usage but haven't gotten to trying it yet.O.K. Bear Creek had some really cheap 14.5" barrels with pistol gas systems on them years ago, I suspect there was a batch that got mixed up between a 223 & 300 Blackout to come up with that oddity. Work with an extra large gas port & short gas system. Ideally it could run in like a standard 16" carbine gas length barrel setup, or worst case only require a single component swap or enlarged gas port w/adjustable gas block to switch from one round type to another.Īs cheap as uppers can be built any more, you could dedicate an upper to it if you're really serious about it. If you're still interested in something like this, there are 100gr 224 bullet moulds, I have wanted to eventually work on something like it for years - a cheap cast bullet of 100+ grains that could be loaded from subsonic up to 2200fps+. You'll still need a really heavy bullet & the right slower pistol powder that produces enough gas at the gas port. Reducing carrier weight, buffer weight, spring, increasing gas port size, adding a suppressor for more pressure, all of those things can help. A 100gr sub would give energy in the range of a 380 pistol round. Even then I'm sure it would be hit or miss depending on the gas system of the gun & gas port size. There are 1 or 2 companies I've seen that sell a 100gr+ subsonic that they claim will cycle an AR. You'll have no issue creating a sub load, cycling an AR is the major challenge here, if that's part of the goal. If you need to do pest control, it will be much more cost effective to just get a. Plus you can run very capable 125 or 150 grain supersonics in it. 300 BO exists and delivers something like three times the energy on target. And they already make 22LR subsonics.Īs others have said. It's a goal that even if you manage to accomplish, you end up with what basically amounts to a 22LR for energy.223/5.56 AR that was essentially useless for doing anything but running subsonics. You'd basically need a lightened buffer, lighter spring, and a tuned gas system to generate enough back pressure to make the first point work.So not Titegroup or Bullseye and also not H110. Pistol powder yes, but something in the lil'gun or 2400 burn rate range that also doesn't mind being very low density. It would take a very short barrel, a suppressor, and an absolutely perfect balance of pressure and velocity to cycle.I am thoroughly convinced of a few things: The highest velocity at almost 1500 fps didn't even begin to cycle. In my 16" AR, the lowest I got to was 1055 fps. I tested it last weekend with AA#5 and 77 grain cast bullets. If you’re interested in using reddit for self-promotion check out our Official Spam Policy. Other Subreddits you may be interested in: This unfortunately includes reloading components like brass, and projectiles. Due to reddit policies all posts selling, trading, or buying ammunition are forbidden. If you'd like to post reloading equipment for sale, for trade, or a request for something you'd like to buy please put, , or respectively, at the beginning of your title. R/Reloading discord join us for supplies and helpful conversation: Https://discord.gg/reloading Posts titled " Help! New Reloader." will have less responses than a post titled like "Questions about crimp for. Please make sure you title is relevant to the specific question you are asking. Remember, if you post a picture, make sure to provides some context.
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