US Navy Ordnance of the 1845/1846 System
In May of 1845, a board of US Navy Captains recommended a system of ordnance for the navy. Their report called for the Navy to standardize on the 32-Pounder. The deficiencies of this system would cause John Dahlgren to design a replacement - which became the Dahlgren guns with which the US Navy fought the American Civil War.
The 32-Pounder of 32 Hundredweight at Petersburg
A 32-Pounder of 32 Hundredweight of the type manufactured for the US Navy beginning in 1846 for use as the main battery aboard smaller sloops is displayed at Petersburg National Battlefield. The 32-Pounder of 32 Hundredweight is a chambered cannon - meaning the chamber in the barrel where the propellant charge is placed is of smaller diameter than the 6.4-Inch diameter of the main portion of the barrel.