The barrel is 1:66 twist. That was one of the deciding factors for buying this one. I don't hunt; and the maximum distance at my range is 100 yards, so I have no need to shoot anything other than ball.
kwhi43,
I had the balls, powder, and patches in hand before the rifle arrived. Balls are .490, patches are Cabelas .020, and the propellant is Triple 7 FFG. I will have to do some conversion math for the Triple 7. I also have some Triple 7 FFFG that I can try.