Brownells Linotype Bullet Casting Alloy. Ingots weight roughly 5 pounds. This alloy consists of 84% Lead, 4% Tin, and 12% Antimony. This very hard alloy is ideal for higher velocity rifle bullets used when target shooting. It's a bit too hard for silhouette shooting or hunting as the alloy tends to shatter on impact with metal plates of heavy bone. If used with pure lead, a 1 to 1 blend with Linotype will produce a Hardball like alloy. Brinell Harness of roughly 22. Made form virgin metals, not from scrap, ensuring you are adding clean alloy. Sold by the ingot, weights are approximate.