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.
.50-90 Sharps cartridges
|Place of origin||United States|
|Used by||United States|
|Designer||Sharps Rifle Manufacturing Company|
|Manufacturer||Sharps Rifle Manufacturing Company|
|Parent case||.50 Basic|
|Case type||Rimmed, straight-taper|
|Bullet diameter||.512 in (13.0 mm)|
|Neck diameter||.528 in (13.4 mm)|
|Shoulder diameter||.528 in (13.4 mm)|
|Base diameter||.585 in (14.9 mm)|
|Rim diameter||.663 in (16.8 mm)|
|Case length||2.50 in (64 mm)|
|Overall length||3.20 in (81 mm)|
|Primer type||Large rifle|
|Source(s): Accurate black powder|
The standard factory loads, produced and sold by the Sharps Rifle Manufacturing Company and the Sharps Rifle Company were .50/100/425 (.50 caliber/100 grains black powder/425 grain grease grooved bullet) and .50/100/473 with a paper patched bullet. Factory loads manufactured by any of the Sharps companies were mostly hand-loaded which made them expensive to produce. This naturally invited competition. Winchester offered the cartridge loaded .50/90/473 with paper patched bullets which may be how the cartridge came to be commonly known as the .50-90. The .50-90 Sharps is similar to the .50-100 Sharps and .50-110 Sharps cartridges. All three use the same 2.5-inch (64 mm) case, the latter two being loaded with more grains of black powder. 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 inches (13.0 mm) diameter. Bullets weighed from 335 to 700 grains (21.7 to 45.4 g). Historical loads using black powder have muzzle energy in the 1,630 to 1,985 foot-pounds force (2,210 to 2,691 J) range, while modern loads using smokeless powder give 2,561 to 2,989 foot-pounds force (3,472 to 4,053 J) of energy.
The buffalo is a large animal and difficult to take down reliably, which led to a demand for cartridges designed specifically for buffalo hunting. The .50-90 was created with this purpose in mind. As a result, the cartridge became immediately popular with the professional buffalo hunters on the Western plains. 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.
Today the round is obsolete. Ammunition is no longer mass-produced by any manufacturer except Buffalo Arms. 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 (e.g., .45-70) makes cartridges such as the .45-70 much more popular than the .50-90.
- Accurate Smokeless Powders Loading Guide Number Two (Revised), Book by Accurate Arms Co, Wolfe Publishing, 2000 p.368
- Buffalo Cartridges by Chuck Hawks
- Cartridges of the World 8th Edition, Book by Frank C. Barnes, DBI Books, 1997, ISBN 0-87349-178-5 p. 140
- Buffalo hunters and Indians clash at Adobe Walls
- Replicating Billy Dixon's Legendary Long-Shot
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