Short-action magnum performance in .270 caliber. Matches .270 Weatherby Magnum velocity in a shorter, stiffer action.
Type: Rifle
Introduced: 2002, United States
Parent case: .404 Jeffery
Standardization: SAAMI
Bullet diameter: 0.277" (7.03 mm)
Case length: 2.1" (53.34 mm)
Overall length: 2.86" (72.64 mm)
Max pressure: 65,000 PSI
Rim type: Rebated
Primer: Large Rifle Magnum
Typical twist rate: 1:10
Muzzle velocity: 2900–3200 fps
Muzzle energy: 2200–2900 ft-lbs
Effective range: 500 yd
Common bullet weights: 130, 140, 150 gr
Primary use: Hunting
Production status: Active
Also known as: .270 Winchester Short Magnum
History: Part of Winchester's WSM family introduced in the early 2000s. Offered .270 Weatherby Magnum-class velocity in a short-action package, theoretically improving accuracy through a stiffer receiver.
Notable firearms: Winchester Model 70, Browning X-Bolt
Similar cartridges: .270 Winchester, 7mm WSM, .300 WSM