.50-90 Sharps

The .50-90 Sharps rifle cartridge is a black-powder cartridge that was introduced by Sharps Rifle Manufacturing Company in 1872 as a buffalo (American bison) hunting round. Like other large black-powder rounds, it incorporates a heavy bullet and a large powder volume, leading to high muzzle energies. It is the most powerful round that a 1874 Sharps rifle could use.

Specifications
The .50-90 Sharps is similar to the .50-100 Sharps and .50-110 Sharps cartridges. While all three use the same 2.5 in case, the latter two use lighter bullets weighing from 335 grains to 400 grains (with the .50-90 using a 600 grain bullet). All rifles made for the .50-90 Sharps should be able to use the .50-110 and .50-100 cartridges due to the case dimensions being nearly identical.

Bullet diameter was typically 0.512 in diameter. Bullets weighed from 335 to 700 gr. Historical loads using black powder have muzzle energy in the 1630 to 1985 ftlb-f range, while modern loads using smokeless powder give 2561 to 2989 ftlb-f of energy.

History


The .50-90 was created specifically with buffalo hunting in mind. The buffalo is a large animal and difficult to take down reliably, leading to a demand for cartridges designed for buffalo hunting. At the time of its invention, there were no special powders or bullet types, and the knowledge of ballistics was fairly limited. Thus, when trying to create a more effective big game cartridge, the designers simply expanded the dimensions of prior cartridges.

Billy Dixon used a Sharps .50-90 at the Second Battle of Adobe Walls on June 27, 1874 to make his legendary 1,538-yard shot.

Today the round is obsolete. Ammunition is no longer mass-produced by any manufacturer. Brass and bullets are produced, but loaded ammunition must either come from a custom shop or be handloaded. Rifles are produced only as semi-custom by a few companies. Rifles in this caliber are typically used for buffalo hunting and reenactments. Occasionally .50-90 rifles are used for vintage competitions, but the commercial availability of other contemporary cartridges such as .45-70 makes them much more popular.