.50-140 Sharps cartridges
|Place of origin||USA|
|Parent case||.50 Basic|
|Case type||Rimmed, straight-taper|
|Bullet diameter||.512 in (Script error mm)|
|Neck diameter||.529 in (Script error mm)|
|Shoulder diameter||.529 in (Script error mm)|
|Base diameter||.551 in (Script error mm)|
|Rim diameter||.652 in (Script error mm)|
|Case length||3.25 in (Script error mm)|
|Overall length||3.95 in (Script error mm)|
|Primer type||Large rifle|
|638 gr (Script error g) FN||1,413 ft/s (Script error m/s)||2,829 ft·lbf (Script error J)|
| Test barrel length: 30"|
Source(s): The Complete Blackpowder Handbook 
The .50-140 Sharps rifle cartridge is a black-powder cartridge that was introduced in 1884 as a big game hunting round. It is believed to have been introduced for the Sharps-Borchardt Model 1878 rifle. The cartridge is very similar to the .500 Nitro Express.
Bullet diameter was typically .512 in (Script error mm), with weights ranging from 600 to 700 grains (Expression error: Unrecognised punctuation character "[". to Expression error: Unrecognised punctuation character "[". g) were used.
The powder charge was typically 140 grains (Script error g) of black powder. Modern substitutes such as Pyrodex are sometimes used, although using smaller charges since pyrodex is less dense than black powder. In a strong action with modern smokeless powder it can exceed a 500-grain (Script error g) .458 Winchester Magnum velocity while using a heavier 550-grain (Script error g) bullet.
The .50-140 was created specifically with big game hunting in mind, and was the most powerful of the Sharps Buffalo cartridges. However, this cartridge was introduced about the time that the last of the great buffalo herds had been destroyed. An obsolete round, ammunition is not produced by any major manufacturer although reloading components and brass can be bought.
Rifles are produced on an infrequent basis by a few companies. The rifles are typically used for buffalo hunting and reenactments. Occasionally the .50-140 is used in vintage competitions, but it produces more recoil than other old-time cartridges such as the .45-70, and so is used less frequently.
- Accurate Smokeless Powders Loading Guide Number Two (Revised), Book by Accurate Arms Co, Wolfe Publishing, 2000 p. 371