RE: pyrodex or triple seven?
777 is very accurate and consistent if your gun likes it: My Encore will make very small groups if you thoroughly swab the barrel with two wet patches after every shot. My CVA Magnum Hunter will fire up to five or six rounds to the same place without swabbing when using110 grains of 777 and the 300 grain .44 caliber XTP in the tight fitting black sabot.