The Earl o SAmmich wrote:Resurrecting this thread. See top post with additional info.
I ran your four starting powders through Quickload and 35gr of Norma 200, due to its more bulky nature than the other three, modeled (=estimated) the closest to subsonic while maintaining an 80% case fill.
Going bang and delivering the bullet downrange, on target, is one challenge. Getting that combination to cycle an AR gas system is another challenge. I have zero experience with Norma 200, though I did give it a serious look 12 years ago, but could not find it anywhere,
for supersonic loads. I also have zero experience with suppressors. The above mentioned load, while keeping that Swift 325 down near subsonic, winds up throwing 1/3 of your charge out the muzzle
unburned. I can't imagine that's a good thing for a suppressor. I suspect that if you want to play the SBR, can, subsonic game, that you're going to have to use a lot heavier bullet than 325gr. Quickload's .452, jacketed bullet, selection only goes up to 325gr. I can't model bullets like those 395 sub-x bullets as they're too new to be in the Quickload library. Ditto on those heavy cast boolits.
Hoot