Buffalo Arms Quality Bullet Moulds These Black Powder Cartridge moulds are CNC lathe-bored moulds made by Buffalo Arms. The mould blocks are made from a blend of copper alloyed pearlitic cast iron for tight grain structure, dimensional stability and extended life. Uses Saeco mould handles or our mould holder mold handles. If you have a bullet design or suggestion for one please feel free to call us, we just may add your design to our line up! We are now able to make bullet designs to a maximum of 1.510" long and some designs are available in double cavity.