300 blackout subsonic load data bulls eye

The AR15 subsonic loads generally use a slower magnum pistol powder like AA1680 to generate enough gas to cycle the action, but this also makes them a lot louder. Īlso this, for target lighter bullets could be the answer.Not a writer, but I've used the 300 a fair amount, and experiment with a lot of loads for it.įirst thing to note, for subsonics, is that you can make much quieter loads for a bolt gun than any of the factory ammo, which is designed to run a semi-auto. Shot them testing higher gradually since they were loaded and I was 3/4 of a grainish away from pressure.īoth of these put three shoots touching, though strung in a line, at 100 in consecutive weeks so that was good enough for my hunting round testing.Īlso this, for target lighter bullets could be the answer. 02 out further before I realized that it wasn’t just my press acting up and I had too much powder. I tested a fair amount above that but it was so compressed when seating my bullet was out. 19.4 of cfeblk is right at a compressed load giving my 1999 fps but isn’t giving me any pressure signs. I wasn’t a fan of the sub Sonics for hunting so I made a supersonic round with a 150 game king. I did a primer test and the 450, br, rem 7.5 didn’t do any better than my standard 400. I have the bullets seated pretty deep in the case but it compressed. In federal American eagle brass I have found 12.1 gr of cfeblk is pretty much a max load with anymore and I notice slight pressure signs on the 220 and it coincidentally puts it right at 1050 fps which is exactly what I would want.

I didn’t even knew it existed but grabbed it right there. My misfortune with 4198 led me to wander the powder aisle at cabelas and I saw cfeblk. Could have been my neck tension and I think a bunch of tension can help too. It would give serious pressure signs around 950 fps with little changes and wasn’t at all consistent. I think trying to maximize volume is important. Loading cfeblk, I figure what could be better than a powder with the cartridge in the freaking name? Thanks to anyone for reading, especially if you have an answer to any of my questions. 300 BLK shooters can't due to their gas guns? Should I be trying to maximize powder volume in the case? Would a faster or slower burning powder yield more consistent MV? I've seen threads on various forums of people swearing by magnum primers for improved consistency, is there any merit to this? But a few (of the many) questions I have are Is there something that would be beneficial for me to try that most. Since I either don't need to worry about or care about any of those factors, I need to find out where to start in developing a subsonic load with the lowest variance and spread that I can.įor now, the projectile I want to push is the 230gr Berger Hybrid.įrom what I've read, most subsonic loads are running either 1680 or Lil'Gun with CCI400 Primers. Most of the information that I come across online seems to be restrictive due to most pet loads being developed with the necessity to A) Fit in an AR mag, B) Cycle an AR gas system, C) Be as quiet as possible, or D) Minimize cost per round. 300 BLK that I want to work up a consistent performing load to throw subsonics out as far as I can (repeatably). I've been entertaining myself with a little project gun lately.

I come to you guys in need of some clarification and confirmation

300 blackout subsonic load data bulls eye