Just a note for those that may not know…
A Colt cylinder rotates clockwise (from the shooters perspective) and the rifling rotates counter-clockwise.
On a Smith, the cylinder rotates counter-clockwise, and the rifling rotates clockwise.
No good reason, just the way it is.
On a Colt Python, when you pull the trigger, the cylinder locks up steady as a rock, with no "play" in it at all.
A Smith does not lock up like that.