One of the flattest-shooting cartridges ever made for its era. Barrel burner that was overshadowed by the 7mm Remington Magnum.
Type: Rifle
Introduced: 1959, United States
Parent case: .375 H&H Magnum
Standardization: SAAMI
Bullet diameter: 0.264" (6.71 mm)
Case length: 2.5" (63.5 mm)
Overall length: 3.34" (84.84 mm)
Max pressure: 64,000 PSI
Rim type: Belted
Primer: Large Rifle Magnum
Typical twist rate: 1:9
Muzzle velocity: 2900–3500 fps
Muzzle energy: 1877–3282 ft-lbs
Effective range: 600 yd
Common bullet weights: 100, 120, 140 gr
Primary use: Hunting, Long Range
Production status: Active
Also known as: .264 Win Mag
History: Winchester introduced it in 1959 as the ultimate long-range cartridge. Its extreme velocity came at the cost of barrel life. The 7mm Remington Magnum arrived in 1962 and offered similar performance with heavier bullets — effectively ending the .264's commercial success.
Notable firearms: Winchester Model 70, Remington Model 700
Similar cartridges: 6.5mm Creedmoor, 6.5 PRC, 7mm Remington Magnum