Yes I have seen that before. Although I am not exactly sure of what causes that I believe that it may be the primer manufacturer. I have a group of 45acp large primers that did that once. I had to make a tool the pry them out in order to save the brass.
Jackie Graham - I'm not going to mess with the bad ones, because there's only 50 or so out of a 1,000. But I'm interested - what did the tool look like and what did you make it out of?
Oops wasn't logged on and just saw your description, Thanks Jackie