Federal

Parrott

 

DIAMETER: 9.8 inches
GUN: 300-pounder Parrott Rifle, 10-inch Caliber
LENGTH: 23 inches
WEIGHT: Approximately 250 pounds
CONSTRUCTION: Common Shell
SABOT: Brass, Parrott Type 1, missing
FUZING: Wooden Fuze Plug
This is the largest rifled projectile in regular use during the War.  A very early specimen, as it has a wooden fuze plug.  Several have been recovered from the Charleston, South Carolina area.
From the August 29, 1863 issue of Scientific American. 

 

From the January 30, 1864 issue of Scientific American.