A large-caliber cartridge on the .308 case, ideal for timber hunting where heavy bullets at moderate velocity dominate.
Type: Rifle
Introduced: 1955, United States
Parent case: .308 Winchester
Standardization: SAAMI
Bullet diameter: 0.358" (9.09 mm)
Case length: 2.015" (51.18 mm)
Overall length: 2.78" (70.61 mm)
Max pressure: 60,000 PSI
Rim type: Rimless
Primer: Large Rifle
Typical twist rate: 1:12
Muzzle velocity: 2200–2600 fps
Muzzle energy: 2150–3250 ft-lbs
Effective range: 300 yd
Common bullet weights: 200, 225, 250 gr
Primary use: Hunting, Big Game
Production status: Active
Also known as: .358 Win
History: Winchester introduced it in 1955 for the Model 70 and Model 88 lever action. Perfect for close-range big game in dense timber. Never achieved commercial success proportional to its effectiveness.
Notable firearms: Winchester Model 70, Winchester Model 88, Browning BLR
Similar cartridges: .35 Whelen, .338 Winchester Magnum