My M2 bolt started staying to the rear with a shell on the carrier, ive tried all the fixes [ i think] new mag spring, longer follower [OR3Gun] thinking the nose of the shell was catching on the lip coming out the tube, I took it apart to polish the bolt release lever another fix I found here, thats when i noticed the groove made by the rim o \f the shell as it rubbed against the side of the receiver along its path out the tube and up into position to be chambered, Im guessing less than 5000 rounds this cant be normal!? anyone else out there have this problem, whats the fix?
Ive polished the groove and tapered it which has helped but i need to stop it from getting worse!