I also have a 597, mine doesn't jam hardly at all. But I have heard of allot of other people complaining about them. I'm just curious. How long have you had your 597? And how often do you take your all the way apart and clean it? When I first got mine I shot it a few hundred times and cleaned just the barrel, after a few more hundred it started jamming. It was then that I realized the gun must be took apart on a regular basis.