Last year I purchased a new S&W 629 4" barrel. When I picked it up I checked it out only to find a number of what I would call serious flaws. 1. The barrel was clocked at about 11:00 o'clock. 2. The cylinder gap was.005 on one side and .009 on the other. 3. The front sight's slot had not been milled in the center of the barrel. 4. There was a tool mark on the barrel's crown.
I tried to talk to someone at Smith about it but was never connected to anyone that actually knew anything about guns...
I sent the gun back with a letter detailing the problems, 4 weeks later I gut the weapon back with only the muzzle crown fixed and no mention of the other problems.
I finally sent the gun to Frank Glenn... master gunsmith and S&W trained. He was amazed. He fixed the cylinder gap but in the process discovered that the hole in the frame for the barrel was not even 90 degrees to the frame!
He said that from what he had heard the real gunsmiths at Smith & Wesson are gone. QC is almost non existent and getting a well made revolver is the luck of the draw. Everything is C&C milled and parts fitters assemble the guns from parts bins. This does not account for machine tools that get worn and tolerances that change.
I sold that gun at a loss and found a 629-4 Trail Boss 3" that WAS assembled and fitted by a gunsmith. It is a wonderful gun. It's isn't as wonderful as the 29-2 that I had and sold in the 1970's but it's close. I am afraid the days of S&W quality have, like many other things, passed.