Been casting my own 38-40 bullets from a good quality Lyman mold . Starline brass and 2F BP . Shooting all in a Uberti Low Wall 38-40 rifle . Accuracy has been ok . However always trying to tweak for better accuracy I noted that my driving band is not equal at the top and bottom once the bullet is seated in the brass . Checked my brass and it was all true . The bullets and the driving band all cast square . I'am using a Lee bullet seating die . The only thing I can figure is that the Lee seating die is just seating the bullet on a angle or crooked ? Any thoughts on Redding's Competition Seating dies ? Their pricey at 75.00$ for just one die ,but they state their die will seat a bullet perfectly straight . Thanks .