I recently picked up a NIB, 597 in 22 magnum for a truck gun. I sighted it in with approximately 20 rounds of Winchester Super X 40 JHP's. I believe they are 1,810 FPS. The rifle shot a decent group but I wanted to try some Hornady 30 grain V-max @ 2,200 FPS, which I have plenty of. Upon firing the second round the bottom of the magazine blew apart breaking off the plastic bottom. As you may be able to see there is also a hole in the bottom of the rim. I know there was a recall with the 17 HMR but thought the 22 mag was okay to use. Is this an inherent problem with the 597 design or just a fluke? Maybe the extra 400 FPS is too much? Your thoughts? I'll try to post a photo.