I have bought five S&W's produced from 2001-2, the 4" 625 having the hammer-lock-zit, and a twenty-year-old 'new' safe queen 6.5" M24. That last one - the 'old' one - was rough as could be, trigger wise. Additionally, it would lock up on occasion. I cleaned & lubed it initially - and several more times, to no avail. Finally, I took the lockworks out - yuck! The inside of the frame had rough milling marks and spattered brass (brazing rod residue? I think the pins are brazed.). Some small Arkansas soft stoning, buffing with a Foredom, and Flitz polishing yielded a fine revolver.
Three of the newer five, 625, 625MG, and 629MG, had light 'action' jobs and trigger return spring replacements 'out of the box' - they are all back to OEM springs now for reliability. My untouched 696 is now just as smooth as the doctored ones - and the 296 is as well. Additionally, it shoots POA at 12 yd with Blazer 200gr GDJHP .44 S&W Specials. The 696 had a scrunched ejector spring - not an operational problem, just found during dissassembl/cleaning - S&W happily sent a new one. The five newer ones have otherwise been smooth & flawless. Thank goodness they don't make them like they used to, if my '83 vintage is an indicator.
My other revolvers are Rugers: Old Army, .454 SRH (My first DA revolver!), and Bisleys/BH's - all worked fine out of the box. My wife's CZ-75B was dead on with Blazers out of the box - appears to be able to work forever without cleaning. My Ruger MKII is better than me. My 24" SS Puma M1892 .45 Colt works flawlessly through hundreds of rounds of LSWC/LRNFP reloads between cleanings - my best ever lever gun. My Marlin 1897 Cowboy, the prettiest firearm I have ever owned, was like that M24 - rough internal milling made the action horrible (No, I didn't 'try it' at the dealer's!). It left me after <2months. My other Marlins worked well out of the box. My CZ-452 .22's were/are fantastic - as was/is my Savage 93FVSS. The brand new Kahr/A.O. 1927 Thompson was a joke - poorly milled bolt ejected the extractor every three rounds - back to them for over 6 wks and they returned it nasty and loose - I sold it.
The moral is simple - everyone can produce a 'bad one' every now and then. Most marques assume we the consumer to be the final QC inspection - do so at the 'dealer's'! I feel that the likelyhood of S&W doing so is low at worst - and they will send you a mailer and have it picked up after a call to their 800 #. Your 329PD could have been dropped, the cylinder 'popped out' , etc. They will replace it - you'll love that revolver - just don't feed it too many .44 Maggies - YOU won't like it!
Yes, I'll buy more S&W's - with that ugo hammer-lock-zit!
Stainz