I have a marlin 60 made in 1973. I've replaced the hammer spring and recoil spring. I also replaced the hammer with a used one from the era as the original had one of it's ears break off.
So the gun is reliable and offers only one occasional issue. It misfires the first shot if it's dirty and I leave a round chambered from a previous shooting session. So, lets say I shoot a few mag tubes full and I stop with a round chambered, then I top the mag off and let the gun set a week, it will misfire that first shot. The shot will fire if rechambered. It seems that it has a lighter hammer strike.
If I clean the gun, load it and let it set it will not misfire. If it's dirty and I load it immediately prior to shooting it won't misfire.
Thoughts?
Bazoo