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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