11-22-2014, 09:45 AM
I had the same problem with my 223 and it was weak loads with a new powder that I tried. Factory ammo should work though. If you find the problem to be the gas block or buffer and it now works, reconsider the loads you make. They might be a little bit on the "closer to max" side after the problem is fixed.
Just my 2c.
Good luck!
Just my 2c.
Good luck!

