My grandpa and great grandpa bought marlin model 60's years ago at the same time, i got my grandpa's and my 2nd cousin got my great grandpas (his grandpa), they both have started to have stovepiping issues and loading issues, my cousin had his reworked and took it to a ''competent'' gunsmith at least 4 times and each time he swore he had the problem fixed. i havent taken mine to a gunsmith yet, i left a message at the local pawn shop where the only ''professional'' gunsmith works around here, but he doesnt work there all the time, the pawn shop just calls him when they get orders for work......i havent heard anything back in over a month.
I think its something kind of common in the older marlin model 60's. i thought that mine was just gritty and grimy inside at first, but i went through with brake cleaner and scrubbed it up real good, and even used nevr dull on the parts i could get to, it improved it for about 30 rounds and then back to the jamming, failing to load, and other issues.
I know its of no help for me to tell you this, just thought i'd say you're not the only one!
and conigam, your signature says youre a gunsmith......ROUGHLY how much does it cost to have a nice refinish on one of these marlin model 60's? i just want the regular ''Blueing" on it.