Got a buddy of mine hat just sent me these pics. 5 rounds out of 50 looked like this. Shot thru a gen 2 or 2.5 G 26. Told him to check the channel liner and see if the striker was bent but other than that I'm at a loss. Gun was just at Glock this week for night sights and extended controls.
Stupid question. Is he sure they are 9mm? Could they be a smaller diameter caliber? Sitting at the bottom of the block might account for the firing pin strike being off center. Could he have loaded a smaller centerfire round?
I looked at the original pic and they are 9mm. Also the misfires happened throughout the session. I talked to him again and he said that the internals looked fine. I suggested that he takes the gun and misfires back to Glock and let them see if they can figure it out.