Confederate

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DIAMETER: 6.3 inches
GUN: Rifled and banded 32-pounder Smoothbore, 6.4-inch Caliber
LENGTH: About 10 inches
WEIGHT: About 41 pounds
CONSTRUCTION: Common Shell
SABOT: Wrought-Iron Ring
FUZING: Percussion, see remarks.

A typical short projectile for a rifled and banded 32-pounder cannon.  The use of a wrought iron band is unusual.  The fuze in the projectile is the only specimen noted.  The body is of zinc, with a copper anvil cap.  Quite likely a Bourbon-James copy.