Source: Library of Congress
Situated on Morris Island in South Carolina, its barrel broken, is one of only three 300-pounder Parrott rifles operated by Union forces during the Civil War. Part of Battery Strong, this particular Parrott rifle saw action during the Second Battle of Charleston Harbor which ran from July 18, 1863 until September 7, 1893 where it participated in the bombardment of Fort Wagner (also on Morris Island) which was defended by Confederate troops who had already defeated two Union assaults which attempted to take the fort.
The Parrott rifle, designed by Captain Robert Parker Parrott, was heavily used by both Union and Confederate artillery forces. The 10-pounder Parrott rifle first appeared in 1860 and by 1862, larger Parrott rifles had appeared, to include the 20-pounder Parrott rifle (used as a field gun) and 30-pounder. In time, heavy artillery for siege warfare and bombardment saw the 100-pounder, 150-pounder, 200-pounder, and the rarest of them all, the 300-pounder Parrott rifle enter service by 1863.
The Parrott rifle, regardless of caliber, was made of cast iron and this was chosen to extend the life of the rifling within the barrel. However, cast iron was brittle and was prone to splitting or cracking under the pressure created by the gasses of detonating gun powder. To reduce this risk, Parrott rifles had a wrought iron band around the breech. Parrott rifles were inexpensive, the 10-pounder only costing $187 to produce, and the Parrott rifle could be built quickly. Not surprisingly, the common 10-pounder and 20-pounder Parrott rifles were in widespread Union service. Despite the banding, the Parrott rifle was still susceptible to barrel bursts or damage.
The 300-pounder (equivalent to a 10” caliber) had a length of 13 feet and a combat weight of 13.5 tons. Two primary shells were fired, one a sabot shell while the other was called a bolt. The sabot shell, a high-explosive munition, featured a metal ring (sabot) around the base of the shell and it was this ring that engaged the rifling within the barrel. Two fuzes were used, one being the Parrott time fuze while the other was a impact fuze. The Parrott time fuze consisted of a Zink plug in the nose of the sabot shell and within was a length of paper. The time delay until the shell exploded was derived by cutting the paper to a specific length. The impact fuze consisted of a percussion cap that was placed in the shell's nose and when the shell hit the target, the cap deformed and created a flame that set off the shell's charge. The bolt was a solid projectile and was mainly used to bludgeon through the armor of ironclad ships though it could also be used to smash into the stone and masonry walls of fortifications and shatter it. These shells had a weight between 222 to 300 pounds each and the typical powder charge weighed 26 pounds. The 300-pounder was muzzle loaded and though the crew size is not known, it was sizable. The 100-pounder Parrott rifle, as an example, required a crew of 17 men. With the barrel at a 30 degree elevation, the 300-pounder could hurl either a shell or bolt to a range of 5 miles.
Returning to the 300-pounder in the photograph, on August 20, 1863, a shell burst towards the end of the barrel, blowing it apart. Exactly what unit was operating the Parrott rifle isn't known but it was either attached to a detachment from the 7th. Connecticut Infantry Regiment or was crewed by men from the regiment. This is because one Captain Sylvester Gray, who served with C Company, 7th. Connecticut, ordered the crew to take up tools and chisel and file away at the jagged end of the barrel until it was clear of any protrusions. With the remaining barrel unobstructed, the crew brought the Parrott rifle back into action with little loss in accuracy.
Fort Wagner held out, enduring near daily bombardment for two months, until September 6, 1863 when the remnants of the Confederate men within the fort (some 400 troops) abandoned it along with Morris Island, ceding it to Union forces.
Photograph taken by Philip Haas/Washington Peale.
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