For the G series go to No Excuses out of Roy Utah. Order the .503 diameter 460 or 495 grain bullets he makes. Load about 80 grains of Triple Seven 2f and start shooting. The smiles are optional. I also shoot Pyrodex P out of the rifles. And when I shoot black powder I like the 3f grade of it. Swiss 3f is another great powder out of these rifles. And although 70 grains does not sound like a lot.. don't worry. That is a great deer load.