The problem is that without seeing the gun or at least having some good, clear pictures, we are basically guessing. The shim suggestion is a good one and should not be very costly, but it is also possible that the frame is stretched to the point that repairing or shimming the collar could leave too large a barrel-cylinder gap. And trying to repair that would almost certainly be much more than the gun is worth, if it could be done at all.
Jim
|