I used CCI primers for years, I only had a couple of times that some rounds didn't go off on the first try. I had to recock and shoot them again. It was old ammo, and a different gun, could be one or the other, or a combination of both, you decide.
I never had one that DIDN'T go off, ever. The reason I don't use them anymore is their availability, Not many places around here stock them anymore.
I would have no problems going back to them, they are fine components, just a little harder to light sometimes.