I have the 627PC - just dropped it at FedEx yesterday for a trip back to the factory. It has a condition of FTF at about 7% rate (over about 2500 rounds of ammo through it).
Just recently I purchased a 325TR & a 327TRR8 (PC revolvers). Both have light primer strikes & FTFs. S&W seems to have two length firing pins they're installing. These have the "short" firing pins in them. There's no reason for S&W to keep installing the short .486" firing pins randomly in guns & the .500" firing pins in others. My 627PC has the .500 F/P, which I temporarily put in the 327TRR8 to get some range time on it (it shot fine in it), pending the new firing pins I ordered.
The 327 has a commendable .003" B-C gap but is negatively offset by .003" of endshake. It's out-of-the box SA trigger is one of the roughest I've had. Both had 4.5# SA trigger pulls, definitely not "PC tuned quality". I smoothed/lightened them up to 2.5#.
My brand new 625-8 PC had a barrel constriction, at the frame, right out of the box. A .443" pin gage, the largest that can be inserted in the muzzle, falls smoothly thru the barrel until it gets to where the barrel threads into the frame & is firmly stopped there. A .442" pin gage will pass the constriction. When firing cast lead bullets in it they start leading at that point. The barrel is canted (more than I thought when I bought it) & the rear sight has to be adjusted fully to the right to to hit POA. My 686+ has the same problem.
The 627PC 5"bbl. 8-Times I bought a few months ago had a forcing cone that was sorely lacking. Circular grooves in it that ended abruptly at the rifling with turned up edges, and, from what I've read, cut too wide. I used the Brownells Revolver Chamfering Tool Kit I bought last year, for another project, to clean it up. Can't fix the "too wide" but now, at least, it has a nice transition to it.
The 625PC & 627PC had poorly chamfered crowns, which I also cleaned up with tools I got from Brownell's. I've posted pictures of a few of my revolver's muzzles before (so I won't again here) that I wasn't happy with. I re-did them myself too.
As stated already, being a Performance Center gun doesn't guarentee anything. Buy it if it has the style/features you want. Some standard production guns are perfectly fine (yes, I have some) while some PC guns may not be, & vice versa. This hasn't stopped me yet, obviously.
It's just best to scrutinize your "new find" closely before you buy.
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