I've gotten the best accuracy in my 6 1/2" Model 57, which was my duty gun for many, many years, with full loads of Winchester 296. It's also proven to be the most accurate in my Marlin Carbines in .41 Magnum.
For plinking loads, I use SR4756, but only because I picked up a 12 pound keg of it many years ago and I use it when I'm making up plinking ammo in several calibers. It's good pistol powder, but not the best for all applications.
Just check your manuals and pick out a load and see if it works in your firearm. If it doesn't, tweak it a little bit, and if it doesn't perform the way you want it to, go to another powder/bullet combination and try it. There are quite a few loads in the Lyman Pistol and Revolver Manual, 3rd edition, that would work for you.
Hope this helps.
Fred