Pay particular attention to the chamber--if it is in the same condition as the area around the rim groove, you could end up with extraction problems. Oiled 0000 steel wool on a rod chucked into a drill works WONDERS on the chamber and bore with absolutely no ill effect--if anything it seems to burnish the surface.(According to the late Ralph Walker in his book Shotgun Gunsmithing.) Just be sure to use a guide to keep the rod aligned if you use a metal one with a brush holding the steel wool. A spent shell with the primer knocked out/drilled a bit if necessary, works great. I agree with Mike on the water no-no, and don't think that solvents are problematic for the most part, anyway. You'll be fine...Steve
