As stated, the " Cowboy Loads ", are close but the original was a 255 grain conical bullet ahead of I believe 40 grains of Black Powder. The magnum of it's day, so to speak. I have an " old ", model Vaquero that will handle the full range of .45 Colt loads and I've shot the 300 grain Corbon's at 1200 fps and believe it or not, they are not horrible recoil wise. I've shot several Hogs with Federals 225 grain Lead Semi Wad cutter with great success. Not so much for the Hogs but I did very well. I also purchased some of Georgia Arms " Canned Heat ", ammunition which is basically a Cowboy type loading and that was very easy to shoot. It's an excellent cartridge with a long and interesting history. If you would like to learn a tad more read Elmer Keith's book, Sixguns and he recounts some very interesting shooting with his old Colt .45 Single Action Armies and his hand loads for them. Sorry to ramble. I just enjoy the cartridge.