I have put together a 300 Blackout with an 8" barrel. I'm using my Tbac 30p-1 with it 100% of the time. It has a standard carbine buffer spring, H2 buffer, and standard carrier. Here's my problem. Using subsonic ammo it runs flawlessly. Supersonic ammo it runs like crap. Some of the supersonic rounds will blow the primers out of the cases. Also it doesn't feed very well. It will pick up the round from the mag, but it won't feed it correctly and it jams. What are the fixes for my problem?
Edit to add: it also ejects the brass to the 5-5:30 area if that matters
Edit to add: it also ejects the brass to the 5-5:30 area if that matters
