Hello, new here this is my first post. I've owned many Marlin 60s, never had an issue with the barrel being loose until the latest one I purchased at a pawnshop. It is an old Glenfield 60 model from the late 70s or early 80s. It was really beat up I got it for really cheap. Didn't notice the barrel was loose until I went to disassemble it at home.. I looked around all over the net to figure out how to repair it. What I ended up doing was :
I purchased this dual party called stop speed steel or steel stick. Made by JB Weld . I stripped the receiver to bare aluminum using aircraft remover. Next I cleaned the barrel with 1000 sandpaper after stripping the black paint that somebody had brushed on LOL. It was horrible looking . I mixed the putty between my thumb and forefinger just as the instructions say kind of feels like silly buddy and stinks really bad. I coated the worn knurled end of the barrel, and put some inside the lower receiver about a 16th of an inch thick around the inside of the opening. I've pushed the barrel back into the receiver, hammered the pin back into place, and quickly cleaned all of the excess that squeezed out. You could feel when the barrel was sitting where it should and was nice and straight. I let it sit for about an hour and then continued with bluing the barrel, repainting the receiver with high temperature chemical resistant enamel, refinishing the stock etc. I could move the end of the barrel about 3/8 of an inch when I purchased it. That equates to about a half mile of inaccuracy at 100 yards LOL. Anyway I got this thing back together threw my scope on it and sighted it in at 75 yards. This thing has been holding zero perfectly now for over a month . I'm shooting groups about the size of a quarter at 75 yards. I just wish I could find more info on it. It has the bull's-eye inlay, also the white laminate piece between the recoil pad and the stock, looks to be a wooden stock not a laminate one. Also has gold trigger. The takedown pin inside of it was not plastic it is too flat head screws same thing for the front pins, they are screws and not pins like the newer models. Last thing I need to do is replace the buffer, as it has crumbled. I saved this classic gun from ending up in the dumpster, and it outshoots my friends Ruger 10/22 all day long LOL