Hand mould

In injection molding, hand molds refer to simple molds that have no provision for heat, cooling, or ejection. This means when a hand mold is cycled universal heating plates are required to warm the molds and the molds must be removed after each cycle to remove the moldings. This drastically increases the cycle time, which limits it to short runs, but to offset this is the low cost of the mold. They are usually single cavity molds, but may be multi-cavity if the molding is quite small. They are usually only of a two or three plate design because of the simplicity of the parts. If only a short run is required then the molds may be made from aluminum or brass, but if more parts are required then they are made from conventional steels.^[3]

Hand cast bullets remain popular with the handloading, muzzleloading and small custom ammunition loading communities. In a tradition dating back to the beginning of firearms, molds matched to the bore (and the chamber for breech loading weapons) are custom made for each weapon. Anywhere from one to six cavities are carved into the molding block, along with appropriate gates and sprues. As the blocks are now usually made out of aluminum, which does not allow lead alloys to stick, only a small amount of parting compound is needed.^[4][5]