RE: Marlin Model 60 .22lr Semi-Auto.
Each of my brothers and I had one as well, fired bricks and bricks of cheap ammo through them for years. They all seemed to have a personality of their own when it came to feeding/extracting. I will say that keeping them very clean and not over lubricating them helps to greatly reduce stopages, esp. in the newer rifles that are still a bit stiff. Sounds like Nomercy has done his homework on these rifles, I would listen to him.