Welcome to the forum Smokin.
That should not be a concern as long as the cylinder is tight at full cock. I don't have a single S&W that doesn't have play at that point in the cycle and some are brand new guns. As long as the cyl stop doesn't jump out of the notch when you check for play.
For dissassembly:
SMITH & WESSON MODEL 10 SERVICE REVOLVER PART 1 - YouTube