He experienced lots of Federal large mag pistol primers and also the store operator advised me that Federal primers ended up much better simply because they would often go bang since they are softer than other primers. I have not experienced a problem with CCI, but I purchased 1000 Federals. https://elliottdreqa.blogdal.com/32269153/the-single-best-strategy-to-use-for-federal-ar-match-primers