just got in from shooting my scar 17. i was zeroing my new trijicon 1-8 and i figured i'd try my tbac ultra9 instead of my saker 762. i was getting erratic shots, even at 50yds. totally not normal. when i got home i noticed this. on the inside of the can, at 3:00, it looks like it was beat with a brass hammer. i only shot 20 times because i didn't feel like wasting ammo. this probably explains the erratic shots.