I sold mine long ago, was a jamming machine. Double feeds, stovepipes, extraction issues. Was rare to get through a mag without an issue. Probably more of a terrible mag design than rifle design as no mag I ever used worked very well. Bought a 10/22, miles more reliable for me.
Just curious... did u ever work over ur 597 or just buy it & shoot it? As well for the 10/22?