My personal experience is that WWB, Federal American Eagle, Remington UMC, Speer Lawman and CCI Blazer Brass are all about the same when it comes to their power. I think of them as regular power loads. Italian Fiocchi and Geco have a little more power. All of my CZ's will run with any of them except my CZ 75B SA which sometimes has trouble with the regular power loads. It's likely because of the heavier slide or the recoil spring.