I worked on lots of them. Most of the time it was extractor problems.
What do you have going on?
This was my first gun when I was a kid. Bought it from a pawn shop for $30. I paid $15 and my dad paid the other $15. I reblued the metal and refinished the stock myself. Mine had the detachable box magazine. I just used it for squirrels, rabbits, and pigeons. I loved it.
But guess what, it had a little extractor clip on the bolt and the clip broke. The gun was stolen from me in a home burglary before I got the extractor fixed.
I would love to buy another one someday just for nostalgia's sake. I had an opportunity at the last gun show I went to but talked myself out of spending the money on it. I've been kicking myself ever since.
Mine had a black, stamped metal clip for an extractor. It just snapped into a groove on the end of the bolt. The one I saw at the gun show recently had a milled and pinned, spring loaded extractor claw. I would think the version with the spring loaded extractor claw would be more reliable than the stamped metal clip.