@stonebuster &
@Hondo 60 - the sentiment, in this case, that every revolver is a law unto itself really doesn't apply. While it is true that some revolvers might get smoother, and some might get worse when "wearing in" the action by dry firing, it is ALSO true that "wearing in" a revolver by dry firing will never yield a result as smooth as having an action job done by a knowledgeable and talented revolversmith.
Lots of shooters are content with factory actions as they come off of the shelf. Lots of shooters are content with "worn in" actions after a few thousand dry fires. But neither changes the fact a tuned action will be smoother, and can be made to run more reliably AND with lighter trigger pull with a simple action job.