why not just copy the 125 nosler bt with the pc coating thickness factored in. Why reinvent the wheel when theres a number of jacketed bullets that run perfectly in the bo. HPs im not much interested in. cast soft enough to expand my guess is most of them will be damaged feeding from the mag into the chamber. If I want hunting bullets ill buy a box of jacketed. what I want is a cast plinking bullet that feeds a 100 percent and hits @ the same point of aim as my hunting bullets do.