Confederate

Brooke, Sub-pattern I

 

DIAMETER:  6.3 inches
GUN:  6.4-inch Brooke Rifle
LENGTH: About 10 1/4  inches
WEIGHT:  About 74 pounds
CONSTRUCTION:  Bolt
SABOT: Copper, Brooke ratchet ring
FUZING: None

An armor punching bolt.   Apparently a very early type, as this sub-pattern's sabot is a combination of the Read band with Brooke ratchets.