I had a DPMS Panther LR308B, it had teething problems right out of the box on milsurp ammo and I have alot of surplus so I pushed new production thru it and still had issues so I sent it in to open up the throat and chamber to cycle 7.62 ammo, still had issues but not as bad when I got it back so I sold it off for a M1A from SAI
The M1A has been 100% and I have pushed about 800-1000 thru the tube with NO FAILURES!!! on any ammo
Maybe I should have given the DPMS a time to break in but I needed a rifle that could go more than 60trnds without needing cleaning
Maybe they have resolved the ammo issues but go to there sight and look at the ammo warnings and check
www.ar15.com