Only problem I have ever had with CCI primers is that they are hard to seat in certain brass from time to time--I have had great luck with both Remington and Winchester primers though, and have had very little problems seating them. That is using small rifle,large rifle, magnum rifle, large pistol, and small pistol--never tried any magnum small pistol primers yet. If I could only use one brand of primers it would be Winchester.
cybin