What was the first bullet made and what caliber was it?

BRY2K

Originally, bullets were metallic or stone balls placed in front of an explosive charge of gun powder at the end of a closed tube. As firearms became more technologically advanced, from 1500 to 1800, bullets changed very little. They remained simple round lead balls, called rounds, differing only in their diameter. I'm a little unsure of the caliber. http://en.wikipedia.org/wiki/Bullet The oldest commercial cartridge being loaded today is a .22 Short made in the U.S. in 1857. http://en.wikipedia.org/wiki/Table_of_pistol_and_rifle_cartridges_by_year Jan 09 08, 6:09 PM