Has anyone ever experimented with turning the 75 BTHP around? They would hit harder because of more frontal area, although real world results might not be worth it.Īlso, it would move the CoP closer to the CoG, basically leaving the mostly hollow nose, now, a drag-reducing tail. And you would have a much more quiet setup on the 223 subsonic if it was functioning in the single shot straight pull operation. 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.
#Subsonic 223 loads powder full
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 don't want baffle strikes, nor stuck rounds.I've searched the archives, but every thread about sub. I don't plan to shoot subsonic much out of my rifle, but when the ATF lets me have my stamp, the giggle-factor is too much to pass up. The problem is, they all keyholed at 100yd.Īside from normal case prep, how important is enlarging the flash holes? I noticed some significant blow-by of the powder on the cases would fireformed cases work better? My powder selection of Titegroup, does not even come close to taking up significant volume, but I'm using a hodgson published load is this article outdated information? I did not lubricate my bullets, but I've got an old tumbler and some moly powder aka Old_Painless' method would this help with consistency? And finally, for those who have done it, what effective range should I measure my loads? I shot all 20 rounds at 100yd and amusingly enough they "grouped" rather well I was able to get respectable groups once I got my elevation holdover down. I have some specific questions regarding development of these loads for suppressor use (I'm aiming for no keyholing). These fired pretty well, but chrono'd all over the place: 20 rounds: Av 1011fps, Spread 285, Min 828, Max 1113. 223 brass, FL sized CCI #400 small rifle primers 3.1gr Hodgson Titegroup (I also have trailboss and Clays available) Hornady 55gr FMJ (#2267) COAL: 2.200" Savage 12FV with 26" tube 223 loads using Hodgson Published load data. While eagerly awaiting my Specwar 7.62 to get out of jail, I took the time to create some subsonic.
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