I noticed this after reading some reloading books. The books said to pay attention what the primer looked like after firing. I have not run any reloads through this gun yet. I decided I need to see what normal looked like first. This is a Glock 27 I have run around 500 rounds through it. My question is this gun is leaving a different looking hit on the primer then my other guns. I have a G21, G30 and a Kimber 1911. Is this something I need to worry about? Wanna kill these ads? We can help!