.300 Winchester Short Magnum
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|.300 Winchester Short Magnum|
From left to right: .300 Winchester Magnum, .300 WSM, .308 Winchester, .223 Remington
|Place of origin||USA|
|Bullet diameter||.308 (7.62mm)|
|Neck diameter||.344 in (8.7 mm)|
|Shoulder diameter||.538 in (13.7 mm)|
|Base diameter||.555 in (14.1 mm)|
|Rim diameter||.535 in (13.6 mm)|
|Case length||2.100 in (53.3 mm)|
|Overall length||2.860 in (72.6 mm)|
|Primer type||Large rifle magnum|
|Maximum pressure (C.I.P.)||63,817 psi (440.00 MPa)|
Test barrel length: 24"
.300 Winchester Short Magnum (also known as .300 WSM) is a .30 caliber rebated rim bottlenecked centerfire short magnum cartridge that was introduced in 2001 by Winchester. The cartridge overall length is 72.64 mm, cartridge case is 53.34 mm in length and the bullet diameter is .308 in (7.62 mm), which is common to all U.S. .30 caliber cartridges. The principle at work in the short magnum cartridge is the advantage of fitting larger volumes of powder in closer proximity to the primer's flash hole, resulting in more uniform, consistent ignition. In field use, this round mirrors the performance of its older counterpart, the .300 Winchester Magnum, which is based on a modified .375 Holland & Holland belted magnum casing.
The advantage to this round is ballistics that are nearly identical to the .300 Winchester Magnum, but in a lighter rifle with a shorter action. A disadvantage of cartridge case designs with relatively large case head diameters lies in relatively high bolt thrust levels exerted on the locking mechanism of the employed firearm. Also in small ring actions the larger chamber diameter removes more steel from the barrel tenon making it weaker in a radial direction .
The .300 WSM is adaquate for hunting moose, black bear, brown bear, elk, mule deer, and white-tailed deer in forests and plains where long range, flat shots are necessary. The .300 WSM is also used in benchrest shooting.
The .300 WSM has a standard bullet diameter of .308 or 7.62mm and takes advantage of the numerous bullet options available in that caliber.
- 10.69 g (165 gr) Full Metal Jacket(FMJ): 982 m/s (3,223 ft/s)
- 11.66 g (180 gr) Full Metal Jacket(FMJ): 943 m/s (3,095 ft/s)
|Cartridge||Bullet Weight (g)||Muzzle velocity (m/s)||Muzzle energy (J)|
|.300 Win Mag||12.96||868.68||4889.84|
|.300 Wby Mag||12.96||932.69||5637.02|
- .300 Remington Short Action Ultra Magnum
- .300 Winchester Magnum
- .300 Ruger Compact Magnum
- Winchester Short Magnum
- List of firearms
- List of rifle cartridges
- Table of handgun and rifle cartridges
- List of individual weapons of the U.S. Armed Forces
- 7 mm caliber
- Delta L problem
- The .300 WSM (Winchester Short Magnum) by Chuck Hawks (subscriptions req)
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