Using real BP the only difference I see between CCI regular and mag caps is how much the cap fragments apart. I dislike using the mags as they seem to always blow apart more and get stuck in the hammer, requiring me to occasionally have to use my nipple pick to get them out. The non mags seem to either fall off as soon as I pull the hammer back or stay on the nipple and can be brushed off. Just a personal preference I suppose, I'd use the mags if that was all I could find, but I do target purchasing the regular ones if they are available.