I've shot many thousands of CCI primers over the last 40+ years, with mostly good results. As pointed out above, they tend to be harder to ignite than most other brands, so I never use them in a tuned revolver, reserving those for Federals or even Winchesters. Additionally, the primer feed on my Dillon 550 doesn't like them, as a result of their being a little bigger and longer, as also pointed out above. My preferences, when I can get them, are Federal for all rifle use, Federal for revolver loads, and either Federal or Winchester for semiauto pistols. For hot numbers like 9x23 or .38 Super loaded to Major, I use only Winchester small rifle primers. I still have and will use some CCI primers, both in rifles and in handguns, but they are down the list at least two clicks, but still above Remington!