Was it trouble with the ammo?
I have some ammo that was not even close to reliable firing in my 597 but other brands were perfect.
The only common problems with the 597s are bad magazines, and bad extraction of fired cases.
The new rifles all come with new magazines which are generally good.
I used to have a lot of FTE problems, but I brought a volquartsen target extractor and haven't had a problem since.
I think the problem is most likely the ammo, or a problem with the firing mechanism.