![]() Bottom line though is the experimenting with what you want to do brought us the 300 black out. Bear Ammo 7.62x39mm 196 Grain Subsonic Full Metal Jacket 500 Round Case - 454.99 Brown Bear 7.62x39 Subsonic Ammunition (500-Round Case) Limited to Stock On Hand Brown Bear 7. Even if cast bullets are 308-309 you can use pc coating on them and gain enough to work at 311. My go to load in mine with a suppressor is 4.5 grains of unique and a 130 cast spitzer. That way I can use any bullet weight and a light charge of powder. Anymore I use subsonic in my American in 300 bo. Atomics Tactical Cycling Subsonic in 7.62×39 produces more energy and power than most. Subsonic loads are DIRTY! Your constantly cleaning your gun. Unsuppressed, it is as quiet as most 22 LR and has minimal felt recoil. I did that and still wasn't really happy. Bottom line is it would be a lot less bother to buy or put together a 300 blackout upper. 762s are tough to get a 100 percent reliable with supersonic. 17 grains to 18 grains of Winchester 748 powder. It will probably take drilling out your gas port and getting an adjustable gas block. To make Subsonic 7.62x39 I start with Winchester brass and Winchester large rifle primers. Then you may have problems with getting enough gas to run the action. Id start with a standard 3 oz and a standard carbine spring. good chance you have something other then a standard 3 oz carbine buffer in there and maybe even a heavy spring. Wolf 308 Winchester 150gr Full Metal Jacket Bimetal 20rd box. Add to that that about all the heavy bullets are 308 and not 311 so make sure your gun has a 308 barrel. S&B 7.62x39mm 124 Grain Full Metal Jacket 20rd box. seated that deep most bullets are going to be to the point your trying to get a grip where the bullet is tapering into a nose. That prevents seating bullets made for the bo out far enough to get a grip on the bullet by the neck. ![]() You can be sure that I will watch the space closely and will be sure to share anything I learn.Problem your going to run into in ars is the round is already long for the magazine. Other than these scant details, there isn’t a whole lot of information on this exciting new development. Built with all Lapua brass casings, the TCXS76239190 is a 190 grain, 7.62x39 caliber Solid Copper, Subsonic Defensive round, with a muzzle velocity of 1,000 feet per second and 422 ft/lbs of muzzle energy, as tested in an OCCAM Defense 1776, 14.5 inch, 1 in 9.5 twist barrel. My expectation is that the new ammo will stay fairly close to these specifications as longer 200+ grain bullets apparently struggle to stabilize in an AK’s barrel. The original 57-N-231U bullets weighed approximately 193 grains and offered muzzle velocity just under 1,000 feet per second. Since the rounds are apparently inspired by the 57-N-231U, some assumptions can be made about the load. 300 BLK offerings, I would expect it to be warmly received by suppressor owners and AK fans alike. Considering that the Russian ammunition will likely be much cheaper than current. Reportedly based on the original Soviet 57-N-231U cartridge that was developed for use with the PBS-1 silencer, the new rounds should allow for regular semi-automatic (or fully automatic for those with the happy switch) function. Fresh off the heels of Dead Air’s AK suppressor announcement earlier this week, a few knowledgeable suppressor/AK enthusiasts have indicated that one of the Russian ammunition companies is currently working on a subsonic 7.62x39mm load (not pictured above).
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