So the back story here is that we have a Remington 7615P that is utilized as a patrol rifle. It uses standard AR magazines and we recently switched to Federal Tactical Bonded 64 gr .223 as our duty round. We previously used Hornady TAP 55gr .223. Since the switch we've been experiencing dented cases on the top rounds of the magazines. We had been using 10 round PMAG M3s and began to theorize that the steeper angle didn't mesh well with the 7615P but when we switched back to aluminum magazines we got the same result. Below are some pictures of the damaged cases. To me is looks like one might even be showing slight set back. I guess the bottom line is, is it safe to continue to use these dented round? And, has anyone else had this issue with this ammo? It seems to be specific to the 7615P as this is not showing up on the Colt LE6920s.

In this image the one in the center is the one I'm concerned about set back with. You can see that the round on the left is also dented.


This is the one that was in the center


Here it is again


And one more