Single Cavity Rifle Bullet Mould #580-416 Hodgdon North-South Skirmish .580 Dia by RCBS RELOADING PRODUCTS Product Overview NOTEThis mould requires a gas check. now offers Single Cavity Rifle Bullet Mould #580-416 Hodgdon North-South Skirmish .580 Dia. This mould is perfect for casting your own bullets for your favorite firearms. The mould is constructed from high quality cast iron and comes complete with sprue plate and hardware. This mould makes two bullets per pour and is designed to be easy to use and fast.