The Smith Carbine was a popular breechloader during the American Civil War. Patented in 1857, and produced through the war by Massachusetts Arms Company, they fired a nominally .50 Caliber bullet from a hard rubber cartridge. My reproduction bullets are a copy of the wartime bullet, cast on an Eras Gone Bullet Mold, and are .518″ in diameter. They weigh in at 354 grains and fit the common reproduction cartridge cases right out of the mold.