I have a nice old brown-box Colt .22 conversion unit for which I put together a dedicated frame. It functions fine except for an occasional misfire, but the accuracy leaves a lot to be desired. It seems to do best with standard velocity match stuff, but 3-4 inches at 25 yds is about all I can expect to get out of it, and some ammo does considerably worse. Has anybody ever tuned one of these up? I have a hazy memory of seeing an article on this somewhere years ago, but don't recall where.
Also, when I take it down for cleaning, the floating chamber is always locked solidly to the barrel from fouling. Doesn't seem to matter if I lube it or not, or what lube I use. Any recommendations here?