I was asked by a good friend to "fix" his .22, a Squires Bingham model 16, the one that looks like an M16. It seems that it will not pick up the last shell in the magazine. Looking at it from the side profile, there is a distinct difference between the angle of the shells with a full clip and with a single shell. As the magazine empties, the point rises and the rim sinks to a point that the rim of the last shell is too low for the bolt to contact it. He said it always had this problem since he first inherited the gun. It seems that the spring is not pushing upward evenly on both ends of the shell. I don't like the idea of taking it apart. Is it possible that the tabs at the top of the magazine are too far apart to keep the shells at the same angle under different spring tension? Should I try tapping the front of the tabs closer to keep the shells at the same angle? Of course I mean the front on the rear tabs that hold the shells in the magazine. I'm not sure how available these magazines are and I don't wish to screw this one up anymore that nessessary. If photos are needed, let me know and I'll try to find my camera. Any response will be greatly appreciated.