RCBS Minie Mould. RCBS moulds are made from tough, pearlitic, malleable iron blocks and meticulously machined to produce solid cast iron moulds. The sprue cutters are made of tough steel plate to cut clean and flat.
 
.54 Cal. Single Cavity Minie Mould .540 diameter This mould has an adjustable base plug that allows a shooter to vary the minie's weight from 315-678 grains with the use of a screw driver and wrench.
 
Uses large RCBS mould handles, sold separately.