Bought the same mold, customized the core pin myself, and here is the result Thanks to my great amateur machinist work, I have one extra step involved in bullet production and that is knocking off a small, thin tail of lead from one side due to my taking a bit much off the core pin's base plate. Still, I made 75 of these in about 2 hours this afternoon. Will put lube in the grooves and also fill the hole in the base with lube to gain hydraulic effect. If they shoot as well as the ones my friend sent, I'll be happy. Mine are coming out weighing 2 grains lighter than his on average at 328 grains.