I shy away from CCI's because I have had a high percentage of them NOT fire. I have probably used around five hundred CCI's from several lots and had problems with nearly every lot. I have used over 10,000 Federal GMM with 0 problems from -20 degrees to 90 above.
I cannot speak for CCI's current quality as I have not used them in nearly 10 years.
I've also had problems with CCI primers not firing