Brownells 16 to 1 Bullet Casting Alloy. Ingots weight roughly 5 pounds. This casting alloy is 16 parts Lead to 1 part Tin (94% Lead, 6% Tin). This gives a Brinell Hardness of roughly 11. A popular Alloy for use in Cowboy Action Shooting and standard blackpowder cartridges. Made form virgin metals, not from scrap, ensuring you are adding clean alloy. Sold by the ingot, weights are approximate.