I have looked at the Lee, Lyman, RCBS, Saeco and Hoch mold charts. From all the mold charts that I have the only thing that comes close to looking like this bullet is the Lee #457-405-F . It is made for the 45-70. The reason that the grease grooves look so small is I would bet that they ran this .457 diameter bullet through a .452 size die and it shaved or squished the bullet down and made the grooves shallow and small.