This is the first time i have seen this out of any of my reloads ever. I done see any other signs of possable over pressure and i am sort of unsure if this is a sign. Can someone please tell me if this is an over pressure sign. The only thing i am seeing is the ridging around where the firing pin is hitting the primer. All of the loads i have ever done have always stayed in the middle range of the suggested load range. These were shot with varget 22.5gr-25.5gr at .3 gr incraments behind a sierra 69gr bullet. Any thoughts or help would be appreciated. Thanks