I tried this in another area, but no response. Possibly the wrong place to ask...
My 300 AAC is proving that it hates 150 grain bullets. This wouldn't bother me so much if it weren't for the fact that I've got about 1000 bullets, a dozen different kinds, that I bought from an estate, and I'd love to at least try to get accuracy out of them.
My typical powder for 300 AAC is IMR4227, but no reasonably safe powder charge is giving me even 2 inch groups consistently. Since the barrel is a 1:7 twist, I'm wondering if I can't launch 150 grain projectiles subsonic, using Red Dot. I assume it will be single shot, since it's pretty much a guarantee the action won't cycle fully on a semiauto.
I've looked through the forums, but of course while discussions often get started, it's hard to find an answer as far as anyone getting consistency.