This seems to be what's happening with my Saiga. I have the flat bottom, with the CSS BG, it has dimples. I got some used Galils from Apex. I cleaned them and oiled them. I noticed the followers do tilt if you try. I tried out three of the mags today they all failed some of the time. Maybe the bolt is riding over the top because it is slamming into the side of the round as it is feeding. There is some forward and back movement in the Galils. Maybe if there was a little weld added to the rear locking lug on the bottom it would hold in tighter. The Circle 10s fit tight no issues after fitting it