I freely use any load in a manual that does NOT say "Ruger ONLY" loads in my S&W's and Italian SAA clones. This warning goes for factory ammo also.
Here's an example of one I would NOT use in a S&W
I got these a while ago and even though I have a Blackhawk in .45 Colt, I'm waiting on delivery of a 5 shot BFR for hot stuff.