I just bought the same gun from Cabela's in December. I use .454 balls, Remington #11 caps, and 20 grains of Triple 7 FFFG. I also use Cabela's lubed wads between the powder and the ball. It all works well for me. I haven't had the gun long enough to try other combinations; so I can't honestly tell you my choices are better than others.
You're gonna like the gun.
