.300 Winchester Short Magnum

From left to right: .300 Winchester Magnum, .300 WSM, .308 Winchester, .223 Remington

Type

Rifle

Place of origin

USA

Production history

Designer

Winchester

Manufacturer

Winchester

Produced

2001

Specifications

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)

Rifling twist

1-10"

Primer type

Large rifle magnum

Maximum pressure (C.I.P.)

63,817 psi (440.00 MPa)

Ballistic performance

Bullet weight/type	Velocity	Energy
150 gr (10 g) SP	3,313 ft/s (1,010 m/s)	3,657 ft·lbf (4,958 J)
165 gr (11 g) HP	3,223 ft/s (982 m/s)	3,807 ft·lbf (5,162 J)
180 gr (12 g) HP	3,095 ft/s (943 m/s)	3,830 ft·lbf (5,190 J)
200 gr (13 g) SP	2,822 ft/s (860 m/s)	3,538 ft·lbf (4,797 J)

Test barrel length: 24"
Source(s): Reloading data at Accurate Powder

.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.^[1] 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 .

Use

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.

Warnings

The .300 WSM is a Delta L problem cartridge, meaning it can present unexpected chambering and/or feeding problems. The Delta L problem article explains this problem in more detail.

Muzzle velocity

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)

Comparison

.300 WSM performance comparisons ^[2]
Cartridge	Bullet Weight (g)	Muzzle velocity (m/s)	Muzzle energy (J)
.300 WSM	12.96	860.15	4794.28
.300 RSAUM	12.96	850.39	4686.10
.300 Win Mag	12.96	868.68	4889.84
.300 Wby Mag	12.96	932.69	5637.02
.300 RUM	12.96	961.34	5988.65
.30-06 Springfield	12.96	783.03	3973.12

References

External links

Wikimedia Commons has media related to .300 Winchester Short Magnum.

C.I.P. TDCC datasheet 300 Win. Short Mag.

Winchester firearms and cartridges

Rifles

Lever-action	Henry rifle Model 1866 Model 1873 Model 1876 Model 1886 Model 1892 Model 1894 Model 1895 Model 53 Model 55 Model 64 Model 65 Model 71 Model 88 Model 150 Model 250 Model 255 Model 9422

Bolt-action	Model 1878 Hotchkiss Model 1895 Lee Navy Model 1900 Model 1902 Model 1904 Model 43 Model 47 Model 51 Imperial Model 52 Model 54 Model 56 Model 57 Model 58 Model 59 Model 60 Model 60A Model 67 Model 68 Model 69 Model 70 Model 72 Model 75 Model 121 Model 131 Model 141 Model 320 Model 325 Model 670 Model 770

Pump-action	Model 1890 Model 1906 Model 61 Model 62 Model 62A Model 270

Semi-automatic	Model 1903 Model 1905 Model 1907 Model 1910 Model 30 Model 63 Model 74 Model 77 Model 100 Model 190 Model 490

Full-automatic	Olin/Winchester FAL Model 1917

Falling-block action	Model 1885

Shotguns

Pump-action	Model 1893 Model 1897 Model 1912 Model 25 Model 42 Model 1200 Model 1300

Lever-action	Model 1887 Model 1901 Model 9410

Single-shot	Model 20 Model 36 Model 37 Model 37A Model 41

Double-barrel	Model 21 Model 24 Model 96 Model 101

Semi-automatic	Model 1911 SL Model 40 Model 50 Model 59 Model 1400 Model 1500 SX-1

Cartridges

This article is issued from Wikipedia - version of the Monday, April 11, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.