He had a lot of Federal large mag pistol primers and also the shop proprietor told me that Federal primers had been much better since they would often go bang since they are softer than other primers. I have not had a difficulty with CCI, but I bought 1000 Federals. https://waylondhbmz.fare-blog.com/31967488/the-definitive-guide-to-federal-large-rifle-magnum-primers-215