Henry Burton’s Minie ball, with its hollow base and rifling, was mass-produced and caused thousands of casualties. (Chris Pondy/Alamy Stock Photo)

Henry Burton's Minie ball, with its hollow base and rifling, was mass-produced and caused thousands of casualties. (Chris Pondy/Alamy Stock Photo)

Henry Burton’s Minie ball, with its hollow base and rifling, was mass produced and caused thousands of casualties. (Chris Pondy/Alamy Stock Photo)