Well, maybe someday I'll figure out the photo thing, but the item in question is a JC Higgins DA 22lr, on which the action locks up and refuses to turn the cylinder without mechanical help-a willing thumb and finger, on more than half of its rotation.
What is fascinating about this little problem is that it only materializes AFTER live fire. The cylinder will lock up on 5 of the 9 chambers. However, if the gun is not fired, the action will easily cycle through the entire cylinder, free and easy. BTW, the JC was made by High Standard, and the action , minus lockup, IS quite positive. By "lock up" I mean that significant resistance is met to simple functioning in either SA or DA. I have checked and smoothed the recoil plate, honed away any possible burrs from the hammer-firing pin is on the hammer-including the firing pin hole in the recoil plate. The tip of the hand was a little burred, so I cleaned that up as well, without changing its profile.
What is amazing is that before the gun is fired, the action works perfectly, even when loaded. I took high pressure powder blast, and gave the action a really good treatment, and am awaiting it to dry. I did manage to blow out a chunk of unrecognizable stuff from the action with this exercise. Have yet to try it again after this treatment, most interested in any feedback on this most interesting problem.
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