There were problems with early generation 597 magazines, but that appears to have been effectively dealt with sometime ago by subsequent design changes. It would also seem that 597 owner experiences can vary depending on which flavour they have... .22LR, .22WMR, .17HMR or the heavy barrel versions.
I bought my .22WMR model last winter and have put well over 1000 rounds through it ...all without any problem whatsoever (none). It's been an accurate rifle since day one and I have no regrets for having purchased it.