The bullet shank has many shallow grooves for maximum liquid lubricant retention. A great way to make bullets in quantity with minimum time, effort and equipment. More accurate than ordinary cast bullets. The reduced friction of the micro bands gives you more velocity with less pressure. Features: Lee mold blocks are made from aluminum because of the exceptional molding qualities Mold cavities are CNC - machined for unmatched roundness and size control Most bullets from lee molds can be used as cast without sizing Trochoidal venting - unique venting on the mold face and sprue plate mating surface allows consistent and effortless fill out Semi wad cutter shape