[masterPsmith]

The older Mod. 60 was notorious for feed problems. When they worked, the worked great. When the old model started to have feed problems, it required replacement of the feedthroat with the new feedthtroat conversion kit. But, it did not always correct the problem. Some old Mod. 60s would just never feed 100% once they started having feed problems. I have probably repaired over 100 of them over the years. Clean it the best you can and lube it well and try different types of ammo. When you clean it, use a good spray cleaner for the fire control group, lube it with a good spray lube and blow off the excess. Do not take the fire control group apart, you will probably wind up taking a bag of parts to your local smith for re-assembly.

Jim.......

[Jeehs]

I have a newer model 60, It chuggs along through whatever ammo I feed it. Even old Federal Lightning 40gr. HPs.

Only issue I have had was when I first got it and didnt clean it often enough.

With that said, every 400-500 Rounds Mine will start to skip a shell, snap, or once in a bluemoon it will jam. Key Lesson- Good Cleanings with a Brush and some Solvent+ Minimal gun oil= Happy Marlin

[big shrek]

I've yet to run across a Model 60, or any semi-auto Marlin that I couldn't make run like a sewing maching in under an hour...

Possibly the easyest semi-auto action assembly I've ever worked on...
AFTER the first time, which had springs shooting across the room...LOL
Once you know what's gonna sproing off in which direction & prevent it, it gets easy

There are some Specific things to do to every one, and I've found that by using those same techniques
on other brands of rimfires, it makes them run quite nicely as well. Even a Squires-Bingham M16

I fully credit my military training in teaching me how to get a rifle properly clean.
That's the starting point. After that it's all in polishing the internals for smooth working.
Well, one other thing...USE SOLID QUALITY AMMO!!! No RGB's for ANY reason.
Remington makes the WORST .22lr ammo known to mankind.
Great centerfire, lousy rimfire.