First, Ruger QC is back on the upswing. I would still STRONGLY recommending doing a pre-purchase checkout of a new specimen, but I say the same about S&W. The only new revolvers I'm interested in that I'd buy sight unseen is Freedom Arms.
That said, when I bought my New Vaquero during the first year of production, I examined three at a dealer and all were so good, the only thing I had to base my selection on was what the fake case colors looked like (the only 357s I could find were blue/fake case). That was close to the beginning of the current "spike" in Ruger QC and I've heard no indications that it's fallen.
BUT LEMONS STILL HAPPEN. M'kay?
Responding to:
They paid more attention to fitting the parts and external fit and finish back then.
Yes, but...that wasn't *entirely* a good thing.
See, early Charters were set up to function "tight". That is, the cylinder would be locked tight by the action at the moment of firing - the cylinder was supposed to have ZERO play in any direction when the trigger was being pulled and the hammer dropping for ignition. Same as a Python and some other classic Colt DAs.
This "tight system" can produce the best accuracy - but that cylinder damned well better be both "tight" and perfectly aligned with the barrel.
If, due to wear and/or heavy loads, it's NOT aligned right yet it's still tight, things go to hell fast.
Ooops.
Ruger and S&W (and some later Colt DAs) took a "deliberately sloppy" approach, leaving some rotational slop in place so that the bullet can do the final rotational alignment between barrel and cylinder. This system is usually a hair less accurate although it isn't that bad when done right.
So: my vintage Charter Arms Undercover 38 is a wonderful, dead tight, absolutely right dream of a little snub. I love it. BUT I also baby it, keeping +P to an absolute minimum...because when that "tight action" system goes a little off, I'd best be checking it often and have it tuned back up when it does.
The new Charter 2000s have adapted the "rotational slop" system of Ruger and S&W. It's less expensive to fit and is more robust.