Skip to main content

.270 Winchester Short Magnum


The 270 Winchester Short Magnum or 270 WSM is a short, magnum cartridge created by necking down the .300 Winchester Short Magnum and fitting it with a .277 caliber bullet. The correct name for the cartridge, is 270 WSM, without a decimal point. It is a member of the Winchester Short Magnum family of cartridges.

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 resulting in a more compact rifle if desired.

Its prefered use case is hunting and long range precision shooting, it has seen little to no military adoption beyond small use cases in special mission units. As such there are no armor penetrating or specialist projectiles, with only factory match and hunting loads available


Ammunition Type Damage Bullet Velocity (m/s) Barrier Penetration
90gr Hollowpoint 30 1100 1.55
130gr Softpoint 35 1004 1.96
140gr Softpoint 41 990 2.1
150gr Match 44 956 1.1
Note: Barrier penetration represents the rounds ability to go through walls and barriers. Armor piercing represents the rounds ability to penetrate body armor plates.

Range Cards

90gr Hollowpoint
130gr Softpoint 140gr Softpoint 150gr Match