The Black Diamond has a 1 in 28 twist. I have one of the ones with the 22 inch barrel. I would echo everything Dave said. I honestly think they will shoot nearly anything well, not fussy at all. I don't think that one at Natchez is a hardwood stock but I think it is composite with the hardwoods pattern. I would love to find a walnut or laminate stock for my Black Diamond. I don't shoot mine with a scope so being dirty is no big deal to me.
Art