I also have a 597 Jammaster. LOL It groups well, once you actually get the round in the chamber. I contacted Remington about it, and they acted surprised. It seems to me, and I could be wrong, the problem is with the magazine. Thats where the shell seems to get hung up. I bought mine when they first came out, so I was not aware of all the problems people are having. Now, I am stuck with it, because most shooters are aware of the problem. Not too mention I would not feel right about selling it to someone knowing itis junk. Hope fully someday they will remedy the problem, but right now we are all SOL.