.50-90 Sharps
File:Sharps 50-90.jpg
.50-90 Sharps cartridges
Type Black-powder rifle
Place of origin USA
Service history
Used by USA
Production history
Designer Sharps Rifle Manufacturing Company
Designed 1872
Manufacturer Sharps Rifle Manufacturing Company
Produced 1875
Variants .50-100, .50-110
Parent case .50 Basic
Case type Rimmed, straight-taper
Bullet diameter .512 in (Bad rounding hereScript error mm)
Neck diameter .528 in (Bad rounding hereScript error mm)
Shoulder diameter .528 in (Bad rounding hereScript error mm)
Base diameter .585 in (Bad rounding hereScript error mm)
Rim diameter .663 in (Bad rounding hereScript error mm)
Case length 2.50 in (Bad rounding hereScript error mm)
Overall length 3.20 in (Bad rounding hereScript error mm)
Primer type Large rifle
Ballistic performance
Bullet weight/type Velocity Energy
365 gr (Bad rounding hereScript error g) FN1,814 ft/s (Bad rounding hereScript error m/s)2,668 ft·lbf (Bad rounding hereScript error J)
440 gr (Bad rounding hereScript error g) FN1,749 ft/s (Bad rounding hereScript error m/s)2,989 ft·lbf (Bad rounding hereScript error J)
550 gr (Bad rounding hereScript error g) FN1,448 ft/s (Bad rounding hereScript error m/s)2,561 ft·lbf (Bad rounding hereScript error J)
Source(s): Accurate black powder[1]

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 Edit

The .50-90 Sharps is similar to the .50-100 Sharps and .50-110 Sharps cartridges. While all three use the same 2.5-inch (Bad rounding hereScript error mm) 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 inches (Bad rounding hereScript error mm) diameter. Bullets weighed from 335 to 700 grains (Expression error: Unrecognised punctuation character "[". to Expression error: Unrecognised punctuation character "[". g). Historical loads using black powder have muzzle energy in the 1,630 to 1,985 foot-pounds force (Expression error: Unrecognised punctuation character "[". to Expression error: Unrecognised punctuation character "[". J) range,[2] while modern loads using smokeless powder give 2,561 to 2,989 foot-pounds force (Expression error: Unrecognised punctuation character "[". to Expression error: Unrecognised punctuation character "[". J) of energy.[1]

History Edit

File:Shiloh Sharps 50-90.jpg

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.[3]

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.[4][5]

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.


  1. 1.0 1.1 Accurate Smokeless Powders Loading Guide Number Two (Revised), Book by Accurate Arms Co, Wolfe Publishing, 2000 p.368
  2. Buffalo Cartridges by Chuck Hawks
  3. Cartridges of the World 8th Edition, Book by Frank C. Barnes, DBI Books, 1997, ISBN 0-87349-178-5 p. 140
  4. Buffalo hunters and Indians clash at Adobe Walls
  5. Replicating Billy Dixon's Legendary Long-Shot

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