Spencer repeating rifle

The Spencer repeating rifle was a manually operated lever-action, repeating rifle fed from a tube magazine with cartridges. It was adopted by the Union Army, especially by the cavalry, during the American Civil War, but did not replace the standard issue muzzle-loading rifled muskets in use at the time. The Spencer carbine was a shorter and lighter version.

Overview
The design was completed by Christopher Spencer in 1860, and was for a magazine-fed, lever-operated rifle chambered for the .56-56 Spencer rimfire cartridge. Unlike later cartridge designations, the first number referred to the diameter of the case ahead of the rim, while the second number referred to the diameter at the mouth; the actual bullet diameter was .52 inches. Cartridges were loaded with 45 gr of black powder.

To use the Spencer, a lever had to be worked to extract the used case and feed a new cartridge from the tube. Like the Springfield Model 1873 Trapdoor Rifle, the hammer had to be manually cocked in a separate action. The weapon used rimfire cartridges stored in a seven-round tube magazine, enabling the rounds to be fired one after another. When empty, the tube could be rapidly loaded either by dropping in fresh cartridges or from a device called the Blakeslee Cartridge Box, which contained up to thirteen (also six and ten) tubes with seven cartridges each, which could be emptied into the magazine tube in the buttstock.

There were also .56-52, .56-50, and even a few .56-46 versions of the cartridge created, which were necked down versions of the original .56-56. Cartridge length was limited by the action size to about 1.75 inches, and the later calibers used a smaller diameter, lighter bullet and larger powder charge to increase the power and range over the original .56-56 cartridge, which, while about as powerful as the .58 caliber rifled musket of the time, was underpowered by the standards of other early cartridges such as the .50–70 and .45-70.

History
At first, conservatism from the Department of War delayed its introduction to service. However, Christopher Spencer was eventually able to gain an audience with President Abraham Lincoln, who subsequently invited him to a shooting match and demonstration of the weapon. Lincoln was impressed with the weapon, and ordered that it be adopted for production.

The Spencer repeating rifle was first adopted by the United States Navy, and subsequently adopted by the United States Army and used during the American Civil War where it was a popular weapon. The South occasionally captured some of these weapons and ammunition, but, as they were unable to manufacture the cartridges because of shortages of copper, their ability to take advantage of the weapons was limited. Notable early instances of use included the Battle of Hoover's Gap (where Col. John T. Wilder's "Lightning Brigade" effectively demonstrated the firepower of repeaters), and the Gettysburg Campaign, where two regiments of the Michigan Brigade (under Brig. Gen. George Armstrong Custer) carried them at the Battle of Hanover and at East Cavalry Field. As the war progressed, Spencers were carried by a number of Union cavalry and mounted infantry regiments and provided the Union army with additional firepower versus their Confederate counterparts. President Lincoln's assassin, John Wilkes Booth was armed with a Spencer carbine at the time he was captured and killed.

The Spencer showed itself to be very reliable under combat conditions, with a sustainable rate-of-fire in excess of 20 rounds per minute. Compared to standard muzzle-loaders, with a rate of fire of 2–3 rounds per minute, this represented a significant tactical advantage. However, effective tactics had yet to be developed to take advantage of the higher rate of fire. Similarly, the supply chain was not equipped to carry the extra ammunition. Detractors would also complain that the amount of smoke produced was such that it was hard to see the enemy.

In the late 1860s, the Spencer company was sold to the Fogerty Rifle Company and ultimately to Winchester. Many Spencer carbines were later sold as surplus to France where they were used during the Franco-Prussian War in 1870.

Despite the fact that the Spencer company went out of business in 1869, ammunition was sold in the United States up to about the 1920s. Later, many rifles and carbines were converted to centerfire, which could fire cartridges made from the centerfire .50-70 brass. Production ammunition can still be obtained on the specialty market.