If you are getting the same ridge from all different headstamp cases, then the problem is not specific to a headstamp and I would look at the resizing die and die to shell plate alignment.BrianC636 said:This brass was R-P but had the same issue in the last few days with WIN, Winchester, federal, perfecta, blazer and Speer brass.
They look just like resized brass from my Lee dies.SouthernDawg said:What about these? They have the small ridge after resizing with a lee die. They are no where near as pronounced as the op's. Are these safe this what all my brass looks like after resizing no matter whether it was a fired out of Glock or not!