I sold a perfectly good S&W Mdl. 36 (Chief Spl) to buy an expensive, at that time (for me anyway), brand new S&W Mdl 60 (stainless Chief Spl.).
The gun had machined metal still inside the handle, attached, that rendered it almost inoperable. The cylinder wobbled as it spun, rod was out of round. The piece on the frame that keeps the cylinder from coming back while open hadn't been machined down enough and would not allowed a chambered round to pass it.
Before I even fired it it had to be sent back to S&W, where they keep it for a while, even though I told them it was a duty gun.
It was never 100%, or at least what I would consider 100%. The timing was off and it would shave lead. S&W never admitted anything was wrong with it, would not replace the gun.
After complaining about it to a judge I knew, he decided he wanted it and traded me a German Walther PPK/S .380 even for it. Only good thing to come of that gun.
By the way, this was during the pinned barrel era everyone thinks so highly of.