Sold by the Bag 4-5 Pounds Alloy consists of 4% tin, 12% antimony and 84% lead. This very hard alloy was designed to completely fill the molds used in the printing process prior to the development of computerized typesetting in the late 20th century. It is a bit hard for silhouette shooting or hunting bullets, as it tends to shatter when hitting metal plates or heavy bones. It is very good for higher velocity rifle bullets when target shooting. Often used as a basis for blending special alloys that require a higher percentage of antimony. If you have a good local source of pure lead, blend it 1 to 1 with Linotype alloy to produce Hardball alloy. The Brinell Hardness of this Linotype alloy is about 22.