I ordered a .480 Ruger SRH from CDNN about a month back. According to the salesperson who took the order, mine was one of the very last they had in stock.
The gun's serial number indicates it was manufactured sometime in 2001. The sticker on the fired cartridge envelope shows a test fire date of 02/09/2009. However, that sticker covers another one that has a test fire date of 12/06/2001. Weird.
Prior to its first range outing, I completely detail-stripped the gun and noticed that the internals were completely devoid of lubricant. The trigger return spring, hammer mainspring and strut were speckled with surface rust, as were the sides of the frame's grip tang. I lubricated and polished the internals, replaced the rusty springs with lighter ones from Wolff, and got the SA trigger down to a very crisp 2 lb. break.
The test load for the gun's first outing was a 325 gr. Speer "Deep Curl" JSP projectile atop 25.4 gr. of W296 in a Starline case, with a COAL of 1.64" and a moderate roll crimp (Hodgdon's website indicates a starting and maximum charge of 25 gr. and 27 gr., respectively, for that projectile weight). I also "borrowed" the Hogue Tamer Monogrip and HiViz FO front sight from my .454 Casull SRH. The first shots from the gun were uneventful; having been accustomed to shooting full power handloads from my .454 Casull SRH, I found the recoil of the .480 Ruger SRH somewhat... underwhelming, being more of a heavy push than a sharp snap. However, the gun proved to be exceedingly accurate, and it was no problem holding sub-3" groups at 73 ft. shooting offhand in SA.
All in all, I can't really say I regret purchasing the gun. I am, however, a tad worried about the surface rusting on the grip tang, and will likely send the gun back to Ruger for refinishing under their warranty sometime soon.