The 434-258-SWC-AA4-101 is a 2 Cavity Aluminum mould. This mould drops a .434 caliber Plain Base 258 grain bullet with a Semiwadcutter profile type. A standard weight Semi-wadcutter design for the 44 Magnum and 444 Marlin Our version of the 434421. This is an RG2 Removable Guide Style Hollowpoint mould. This mould can be converted to flat point cup point or hollowpoint by changing pins.