Bought some 8 rnd. Chip Mc power mags. They will not stay in the gun when firing or working the action with a loaded mag. They drop down about 1/4" and tie up the works. Was thinking that maybe the mag latch is worn but the originl 7 rnd. factory (Auto Ord.) works just fine. This is the second batch of CMC mags to act this way for me in the gun. I'm more then willing to order new parts if that's the problem. But the fact that the factory mag works makes me not want to spend money needlessly. I'm about at wits end. Any suggestions?