I was using hornady match 120gr A-max's, and every few shots, the bolt would come back hard. On about the 25th round fired, the bolt flat-out refused to come back with any reasonable tugging. I got it home and removed the scope. After a few firm bumps with my palm, it still refused to budge. I finally got the round unseated after some careful tapping with a rubber mallet. Nothing appeared to be wrong with the casing, but not having a Mike I couldn't tell for sure. I called the place I bought the gun from and they said that overpressuring seems to be a common thing with the hornady 6.5 creeds. I do believe I will get into handloading.