I do know a man, late 70s, has in all probability 70-80k LRPs and perhaps fifty percent as a lot of EACH other primer which includes shotgun, so a couple hundred thousand primers…he hasn’t shot as well as reloaded in over ten years. Now I do use primer flatness for https://federalprimersammunition81357.techionblog.com/31856448/the-smart-trick-of-federal-large-pistol-primers-no-150-that-no-one-is-discussing