I've put just under 1000 rounds through my 454 Super Redhawk using the same 200 pieces of brass that I've been reloading over and over. I recently got a .454 Puma 92 and today, after shooting it I realized that a lot of my cases had been greatly stretched! Before I never had to trim my cases and they were actually SHORTER than the trim length listed by Freedom Arms (1.380"). But today after firing, the brass that held the full power loads took a bit more effort to resize than usual, and afterwards, they measured about 1.40"! I noticed this when I loaded a handful of rounds and found that some of them weren't crimping the same. The Puma most likely has a looser chamber than the Super Redhawk, but should it make this big a difference? I feel like this gun is going to be pretty rough on my brass, at least compared to the Super Redhawk.