I use the polymer RIMZ type moon clips. Where the exrtractor is you have to do a bit of filing to remove the nubs and test as you go. I tries this and loaded RIMZ ckips and they just drop them in the chambers. When it comes time to remove the spent shells all you use is your fingers. The barrel on my Brazilian 1937 contract S&W does show some wear and roughness so stashed away is a brand new S&W barrel. Only thing I really don't like is the half moon front sight.Thinking about removing the half moon portion slitting the base and installing piece of steel and adding a flat piece of steel and using a 0-80 brass screw as a bead. That and cleaning up the rear sight slot. When I like shooting revolvers I like to have a reference spot on the front sight. Frank
Frank