He had lots of Federal large mag pistol primers plus the shop owner told me that Federal primers were greater simply because they would usually go bang simply because they are softer than other primers. I have never had a dilemma with CCI, but I bought one thousand Federals. Sam3460: https://winchester-small-rifle-pr39494.ziblogs.com/31927527/detailed-notes-on-federal-primers-large-pistol