Brownells 25-to-1 bullet casting alloy consists of ingots weighing approximately 5 lb each. This casting alloy comprises 25 parts lead to 1 part tin, equating to 96% lead and 4% tin, resulting in a Brinell hardness of approximately 9. It is a favored alloy for Cowboy action shooting and standard black powder cartridges, such as the .45-70 Government. Manufactured from virgin metals rather than scrap, this ensures the addition of a clean alloy. The product is sold by the ingot, with weights being approximate.