![]() ![]() Even if it would, why? You would get much better terminal effect with a 300 whisper if you want subsonic semi-auto operation. ![]() The 223 subsonic would more than likely never be enough to operate a gas system. Yeah, you just answered your own question. The 300 Whisper works like this, but then again that uses more powder. I have thousands of those ready to go.Īlso, I think that a wide gas port opening in combination with a pistol length gas system and a light weight buffer/spring could allow for cycling. I'll take the advice given here from other folks and use lighter, shorter bullets. It will not have sufficient gas pressure to operate the BCG, so you'll be shooting straight pull bolt action style.ĮTA: I guess if I'd read the thread I wouldn't duplicate other's effort Since we're talking about a fast burning pistol powder here, velocity in a shorter barrel likely won't be much less. ![]() Using 4.5gr of Solo 1250, the bullet gets 1052 fps from a 24 inch barrel. Is there a load to make H335 send 75grs subsonic? Also, will 75gr bullets stabilize enough at that low of a velocity to prevent baffle strikes? I'll be shooting out of an 18" 1x7" twist WOA SPR barrel.ĭisclaimer: I know that any load data provided is "use at your own risk" and I know to start loading 10% less than the provided load and work my way up.Īccurate Arms lists a subsonic load with Hornady 75gr BTHP. I've read that subsonic rifle loads usually use pistol powder, and usually only around 5gr of it.ĭoes anyone know the best powder and charge for 75gr subsonics? I've got a bunch of H335 that I use for 55gr full power rounds. I'll be using bulk 75gr HPBT bullets from wideners and wolf SRM primers. 223 suppressors, which is what I'll be shooting my subs through. I've searched the archives, but every thread about sub. ![]()
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