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.270 Winchester Short Magnum

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Title: .270 Winchester Short Magnum  
Author: World Heritage Encyclopedia
Language: English
Subject: Weatherby, List of rifle cartridges, Remington Model 700, Winchester Short Magnum, Browning BLR, .264 Winchester Magnum
Publisher: World Heritage Encyclopedia

.270 Winchester Short Magnum

270 Winchester Short Magnum

270 WSM cartridge
Type Rifle
Place of originUSA
Production history
Parent case.300 WSM
Case typeRimless, bottleneck
Bullet diameter
Neck diameter
Shoulder diameter
Base diameter
Rim diameter
Rim thickness
Case length
Overall length
Case capacity
Rifling twist1-10"
Primer typeLarge rifle magnum
Maximum pressure
Test barrel length: 24"
Source(s): "Shooting Times" [1] / Accurate Powder [2]

The 270 Winchester Short Magnum or 270 WSM is a short, unbelted, magnum Cartridge (firearms) created by necking down the .300 Winchester Short Magnum and fitting it with a .277 caliber bullet. The correct name for the cartridge, as listed by the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), is 270 WSM, without a decimal point.[3]


When it was introduced, the 300 WSM sported a new case that showed a lot of promise for uses in other calibers. In 2002 Winchester introduced new cartridges in its Winchester Short Magnum family, including the 7 mm WSM and 270 WSM. This new .270 cartridge was the third commercial .270 ever produced, and the first one in 60 years.[1]

The 270 WSM is an improvement over the older 270 Winchester providing higher velocity with bullets of the same weight, and thus a flatter trajectory and more energy. Velocities tend to be about 250 ft/s (76 m/s) faster, in a cartridge that is shorter and can therefore be used in a shorter action for a more compact rifle if desired.

See also


External links

  • The 270 WSM by Chuck Hawks
  • 270 WSM Accuracy in Browning X-Bolt

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