"Still looking for the right answers but 1680 is supposed to be it in the AR. I have a bolt gun, and its louder than I desire as a powder to be with a can…" rost 495
I've got two bolt guns and a single shot, only worked with one of the bolts so far. I tried several powders; W231, bullseye, trailboss, H2400, aa 1680, imr 4227, power pistol, a5744, imr 4198 & lil gun. Shooting 220 subsonics suppressed I compared the level of noise; W231 & trail boss were the quietest. I like trailboss but have to weigh each charge to get the best accuracy.
I plan on putting together an AR-15 in 300 BO and everything I have read (so far) has stated that 1680 is the powder for a gas gun. You might look at the hand loading section in 300botalk, some good info there.
Bearstalker,
If you're talking subsonic; 8.5 grains/Lil Gun gave me 1033 fps with 220 grainers (again in a bolt gun).
Jerry
http://www.300blktalk.com/forum/viewforum.php?f=141&sid=9ba833449b124ce9125cc0d0e32a5336
