My stance sort of evolved over the years, usually used in the field hunting. I shoot single action revolvers, more often than not a .44 Magnum.
I face nearly ninety degrees away from the target, right arm (gun hand) nearly straight, left hand gripping shooting hand and pulling back slightly, my feet firmly planted. My cheek nearly rests onm my shoulder, sort of like shooting a rifle. This is good for long range shots out to a couple hundred yards or so.