Probably 95%+ of all the primers I've used are CCI. That's because I have four RCBS progressives (two Pro 2000's and two Piggyback III's) that use CCI strip primers.
Never had a problem. 80,000+ round and NEVER had a problem. Also those strip primers feed through the RCBS progressives better than any other progressive primer system I've ever seen.
I've probably got 100,000 CCI primers on hand and am about to buy another 100,000. Couldn't like them more.