Glad you like your gun, I'm thinking real hard about one of those. Isn't it amazing what fat, heavy bullets will do at moderate velocity? The .45 colt has always been a great stopper. A fat, 250 gr bullet at about 900 fps will do anything you want to do. Your cowboy load is advertised at 650 fps but the Winchester clocks 580 fps from my 5 1/2" Hartford, Magtech ammo does 615, and my favorite handload, 8.2 gr unique (with 250 cast) does 825 fps. Read the article by Brian Pearce in Feb. Handloader magizine for some more input. I used to want to push a cartridge as far a I could safely, but I find that is not necessary anymore. You probably don't need that RV for hunting, unless you are doing Grizzly with it. At 900 fps (9 gr unique) load will shoot thru any game animal in the U.S. with four hooves. Skeeter Skelton shot a lot of mule deer with it and alway said it "killed all out of porportion to it's paper ballistics." Enjoy that Stampede and don't worry about having to make it a "Magnum". 44 Man