.30-40 Krag
From Wikipedia, the free encyclopedia
| .30-40 Krag | ||
|---|---|---|
 |
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| Type | Rifle | |
| Place of origin |  United States |
|
| Service history | ||
| In service | Army | |
| Used by | United States |
|
| Production history | ||
| Designed | 1892 | |
| Specifications | ||
| Bullet diameter | .308 in (7.8 mm) | |
| Neck diameter | .338 in (8.6 mm) | |
| Shoulder diameter | .423 in (10.7 mm) | |
| Base diameter | .457 in (11.6 mm) | |
| Rim diameter | .545 in (13.8 mm) | |
| Rim thickness | .064 in (1.6 mm) | |
| Case length | 2.314 in (58.8 mm) | |
| Overall length | 3.089 in (78.5 mm) | |
| Ballistic performance | ||
| Bullet weight/type | Velocity | Energy |
| 100 gr (6.5 g) SP | 2,898 ft/s (883 m/s) | 1,865 ft·lbf (2,529 J) |
| 130 gr (8.4 g) HP | 2,746 ft/s (837 m/s) | 2,177 ft·lbf (2,952 J) |
| 150 gr (9.7 g) Nos Part | 2,575 ft/s (785 m/s) | 2,209 ft·lbf (2,995 J) |
| 180 gr (12 g) SP | 2,276 ft/s (694 m/s) | 2,071 ft·lbf (2,808 J) |
| 200 gr (13 g) RN | 1,974 ft/s (602 m/s) | 1,731 ft·lbf (2,347 J) |
| Source: Hodgdon [1] | ||
The .30-40 Krag/.30 U.S./.30 Army/.30 Government was a round of ammunition developed in the early 1890s to provide the US armed forces with a new, powerful round to fire from the rifle it was going to select in the 1892 trials. Since the round it was replacing was the .45-70 Government, the round was considered small-bore at the time. The rifle selected was ultimately the Krag-Jørgensen. It was the first round used by the US army designed for smokeless powder.
The rimmed 30-40 round was also known as .30 Army, .30 U.S., or .30 Gov't. The .30-40 Krag was the first smokeless powder round adopted by the U.S. military, but it retained the "caliber-charge" naming system of earlier black powder cartridges, i.e., the .30-40 Krag employs a .30 caliber (7.62 mm) bullet propelled by 40 grains (2.59 g) of smokeless powder. As with the .30-30 Winchester, it is the use of black powder nomenclature that often leads to the incorrect assumption that the .30-40 Krag was once a black powder cartridge.
In 1899, the .30-40 was used to shoot the world-record Rocky Mountain elk. The record stood until the latter half of the 20th century.
[edit] Rifles and Handguns Chambered in .30-40 Krag
- Krag-Jørgensen
- Winchester High-Wall
- Remington-Lee
- Remington Rolling Block
- Winchester Model 95
- Ruger No. 1
- Thompson-Center Encore
[edit] See also
- List of rifle cartridges
- .30-03 (.30-45)
- .30-06 Springfield
- 7 mm caliber other cartridges of similar size.
[edit] References
- Barnes, Frank C; Skinner, Stan (Ed.) (1965, 1969, 1972, 1980, 1985, 1989, 1993, 1997, 2000, 2003). Cartridges of the World (10th ed.). Iola, Wisconsin: Krause Publications. ISBN 0-87349-605-1.
- .30-40 Krag at The Reload Bench
- .30-40 Krag by Chuck Hawks
- Hornady Handbook of Cartridge Reloading vol I, Sixth Edition; Book by Hornady Mfg Co, 2003
- Cartridge Dimensions at Steve's Pages
