Olle,
I bought a police turn-in S&W Mod. 66 revolver from a friend that said he couldn't hit anything with it. This gun is not a pinned and recessed model. On close examination, the barrel was unscrewing and the front sight was way off!! I removed the barrel and checked everything over, and the threads on the barrel and in the frame were in excellent condition. I cleaned everything up good, applied a bit of LocTite blue to the threads and put everything back together and aligned the barrel to the frame so that the front sight was aligned correctly. That was 2-3 years ago, and all is well, but I do check it every time I clean it after a range trip. Perhaps my gun was just a fluke, as I have not heard of another S&W revolver doing this.
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