I'm shooting a .735 roundball of Brinell hardness 18 (my bore is .7345) over an ox-yoke fiberwad lubed with wonderlube on top of a Winchester W12 pink wad (can't recall all letters just now) petals removed, over 34 grns of Longshot in a cheddite hull and cheddite primer. Showed no signs of leading at velocities over 1250. Not sure why higher velocity showed cleaner tubes. This round is accurate in my opinion as I load the hulls full length and seal with beeswax. There is no crimp or jump to forcing cone for the ball to deal with.