Brownells 16-to-1 bullet casting alloy consists of ingots weighing approximately 5 lb each. This casting alloy comprises 16 parts lead to 1 part tin, equating to 94% lead and 6% tin, resulting in a Brinell hardness of approximately 11. It is a favored alloy for Cowboy action shooting and standard black powder cartridges. Manufactured from virgin metals rather than scrap, it ensures the addition of a clean alloy. The alloy is sold by the ingot, with weights being approximate.