Re: Spent cases being clipped
This is not unusual in full automatic weapons and is seen sometimes in semiautomatic weapons. If every round is being dented with factory ammo, then there is probably a fixable problem in there somewhere.
Having pictures of the cases, with the orientation of the case in the chamber will help. Mark the case with a marker, place the round in the chamber with the mark up (or lrft or right or down) and see where the dent is being made.