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FIND .338 WIN MAG AMMO AT BEST PRICE

338 Win Mag Ammo

In Stock 338 Win Mag Ammo Sale From Trusted Ammo Vendors

The .338 Winchester Magnum is a .338 in (8.6 mm) caliber, belted, rimless, bottlenecked cartridge introduced in 1958 by Winchester Repeating Arms. It is based on the blown-out, shortened .375 H&H Magnum. The .338 in (8.6 mm) is the caliber at which medium-bore cartridges are considered to begin.

The .338 Winchester Magnum ammo is based on the .375 H&H Magnum, which was shortened to 2.500 in (63.5 mm), blown out, and necked down to hold a .338 in (8.6 mm) bullet.

The .338 Winchester Magnum rifles are the first choice among professional brown bear guides in Alaska to back up clients where a powerful stopping caliber is required on charging bears. It is also the most popular medium-bore cartridge in North America and has the most widely available choice in rifles among medium bore rifles.

About: .338 Win Mag

  • Type: Rifle
  • Place of origin: USA
  • Manufacturer: Winchester Repeating Arms
  • Produced: 1958

Specifications

  • Parent case: .375 H&H Magnum
  • Case type: Belted, bottleneck
  • Bullet diameter: .338 in (8.6 mm)
  • Neck diameter: .369 in (9.4 mm)
  • Shoulder diameter: .491 in (12.5 mm)
  • Base diameter: .513 in (13.0 mm)
  • Rim diameter: 532 in (13.5 mm)
  • Rim thickness: .050 in (1.3 mm)
  • Case length: 2.500 in (63.5 mm)
  • Overall length: 3.340 in (84.8 mm)
  • Case capacity: 86 gr H2O (5.6 cm3)
  • Rifling twist: 1-10"
  • Primer type: Large rifle magnum
  • Maximum pressure: 64,000 psi

Ballistic performance

Bullet mass/type Velocity Energy
200 gr (13 g) SP 2,950 ft/s (900 m/s) 3,866 ft⋅lbf (5,242 J)
225 gr (15 g) SP 2,800 ft/s (850 m/s) 3,918 ft⋅lbf (5,312 J)
250 gr (16 g) SP 2,655 ft/s (809 m/s) 3,914 ft⋅lbf (5,307 J)
275 gr (18 g) SP 2,489 ft/s (759 m/s) 3,784 ft⋅lbf (5,130 J)

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