3.63 inches
20-pounder Parrott rifle, 3.67-inch caliber
LENGTH: 9 1/4 inches
WEIGHT: 17 pounds 15 ounces
SABOT: Wrought iron ring
FUZING: Parrott zinc fuze plug, paper time fuze

Typically the short variety of the 20-pounder (3.67-inch caliber) Read-Parrott shell was filled with lead case-shot balls. The projectile was shorter in order to keep the weight under 20 pounds, due to the added case-shot material. The wrought iron sabot was cast first and suspended in a mold around which the iron body was poured, thus embedding the sabot during this casting process. This was unlike the later production brass Parrott sabots which were cast directly onto the body. Parrott patented an improvement upon Read's sabot design; therefore, the name Read-Parrott is assign to all Federal and Confederate projectiles with this iron sabot style and body design.