Glad they handled your issue in an expeditious manner.
I'm a longtime Ruger owner myself.
I had an early production Redhawk .44 that had to go back, and they replaced the cylinder, hammer and entirety of the trigger guard assembly to resolve my problem.
My early production KP90DC had to have the slide replaced to address a nasty galling problem between the hammer and the slide's pickup rail. They explained that a heat treat problem with the slide had occurred, and they replaced the slide.
My SBH .44 had to go back to have the cylinder pin hole recut and deepened (known issue with the early production of the New Model SBH's, and mine was made in the early part of '73, being the first year's production of the new Model SBH).
I corrected a couple issues with one of the .22 pistols I owned (short Bull barrel), and an issue with my SP101DAO seizing when it got hot, without having to return the guns to Ruger.
The early 50's vintage 6" Ruger Standard .22 pistol I inherited from my father had an issue with the barrel coming unscrewed, but that was when my father had first bought it. He had a local smith install a set screw through the barrel/slide threading on the bottom of the barrel, and that flush set screw has never loosened in all the years I've owned and shot it.
Oddly enough, only one of the Security/Speed/Service-Six .357's I owned ever had a problem, and I suspect that since it was bought Used it had been caused by the previous owner. (The blued 6" model had been electroless nickeled.) I traded that Ruger off on something I can't remember.