I had a million issues with my .597. I used it as a chance to start working on guns, and now it runs like a champ. I've read countless stories about the original magazines being the problem, and I believe it, as when I bought a new 30 round magazine, the problems vanished.
I free floated the barrel, polished the internals and took a stone to the trigger, as well as painted it.
Check out volquartzen. They make tons of aftermarket things for the 597.
I went from hating this rifle to using it the most. Hopefully you get a good one... But keep in mind, I bought mine in 1998, so I'm sure any issues have been worked out by the factory.
Also, I wrote Remington about my issues and they promptly offered to send me free magazines, so I think the company is solid.
"If you remember nothing else about what Iím about to consider here, remember this: the one and only reason politicians, bureaucrats, and policemen want to take your weapons away from you is so that they can do things to you that they couldnít do if you still had your weapons."ó L. Neil Smith