Sold by the 5 lb bag. Ingots are approximately 8-3/4" x 1" x 2" and weigh 5 pounds (+/- .25). Twenty five parts of lead and one part of tin (96% lead, 4% tin). This has been the standard blackpowder cartridge alloy since the 45 70 Government cartridge was first loaded in 1873. It is also popular with many of today's Cowboy Action Shooters. The Brinell Hardness of 25 1 alloy is approximately 9.