I never joined the rifle team, but it made me think of walking the rifles through campus, taking them from lock up to the on campus range. Never a second thought or worry.
Maybe, if rh has reloading tools, he could see if it is possible to seat the fired primers in deeper on the fired brass like it shows on that light primer strike round. There is probably a quality control issue if it came from the factory like that.
If I had to guess, the primer seating step in manufacturing, or possibly even reloading, would have had a stop to prevent crushing a primer and maybe the firing pin pushed it in a deep pocket.
