I have a Stevens Favorite (1915) with a sticky chamber. I have used a chamber iron on it and the upper part of the chamber looks clean. If I shoot shorts they pop right out, no problem. When I shoot long rifle ammo it sticks. I have tried several different standard velocity rounds along with CCI quiets and some Super Colibri. The hotter the round the harder it is to get out. When I get the brass out I don't see any marks like there is a burr.
Besides the chamber iron I have chucked a 223 brass brush in a drill and cleaned the chamber with Simple Green, CLP, and Kroil(not all at the same time). I am unable to locate a chamber hone for 22lr. Oh great wise Castbooits gurus help me. This rifle is fun to shoot, but, I am tired of carrying needle nose in my pocket.