![]() ![]() Good stuff.Ĭivil? I don’t know how many have fired a 5.56 AR-15 carbine inside a room, but it’s sensory overload. Big bullet! My magazines currently hold my most-trusted Nosler 220-grain factory ammo. I built a specialty AR-15 for home defense that I also featured in recent book project, and that was my choice. One reason for its popularity is the supersonic/subsonic option. Pretty much, it’s for those who want a bigger bullet in an AR-15 with a minimum of technical distractions (some call them problems). I like it especially in the shorter guns, and, around here at least, it’s looked on as an effective Whitetail cartridge choice. 300 Blackout, aka: AAC, is a popular cartridge among AR-15 fans. If you're going to do a lot of BLK loading though you might ultimately look in another direction for powder, and at that same burn rate Lil Gun and H110 are both really good for the BLK.Understatement. I've had some luck with lightened buffers in situations where the rounds just wouldn't cycle, so it's something to keep in mind. The other thing you can do if you want to stick with lower loads is try switching to a lighter buffer or even pulling a weight if needed. Best thing to do is to work up a few loads for yourself until you start seeing pressure signs and then go from there. ![]() Anyhow, I have loaded 2400 under the 125's up to 16-17 grains before I started seeing pressure signs, and once the loads get a little hotter they will cycle the action. I think a lot of that published data is probably 300 Whisper loads which are lower pressure than the 300 Blackout (think 223 vs 5.56). I've been loading BLK for quite a few years now, and find that most of the published data is well below what I and others have been loading. And have you tried white elephant for powder? Also, does your gun function 100% with different factory ammo? Burn rate, next to safety, is the single most important factor there is to reloading. ![]() H322, H335, and even BL-C(2) See the burn rate chart to see where these powders are relative to burn rate from fast to slow. The 762,x39 has a larger case capacity than the 300 blackout and calls for slower burning powders such as H4198. and the heavier the bullet with case capacity remaining the same, the slower the powder needs to be. The larger the case capacity relative to the bore, the slower the powder needs to be. Hodgdon lists 296, 4227 and lil'gun for the 300 blackout all of which are slower burning than 2400 and hodgdon does not list 2400 for use in the 300 blackoutĪ faster powder such as 2400 would work better with a lighter bullet such as a 110 grain. I suspect that 2400 is a little to fast a burn rate for the 300 blackout which has a case capacity smaller than, but close to the 762x39. With the M1 Garand too slow of a burn rate will bend the op-rod. Is anyone loading this combination? Thank you for your help before hand.īurn rate can effect the recoil impulse and cycling. Surprise! So I am using the powder I have on hand 2400 with nosler 125gr ballistic tips. CJ-7Fbomb wrote:I am loading 300 blackout but can't seem to find the powder I am looking for. ![]()
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