.338 Remington Ultra Magnum
From Wikipedia, the free encyclopedia
| .338 Remington Ultra Magnum | ||
|---|---|---|
| Type | Rifle | |
| Place of origin | USA | |
| Production history | ||
| Designer | Remington | |
| Designed | 2000 | |
| Specifications | ||
| Parent case | .300 Remington Ultra Magnum | |
| Case type | Beltless, rebated, bottleneck | |
| Bullet diameter | .338 in (8.6 mm) | |
| Neck diameter | .371 in (9.4 mm) | |
| Shoulder diameter | .5250 in (13.34 mm) | |
| Base diameter | .5500 in (13.97 mm) | |
| Rim diameter | .532 in (13.5 mm) | |
| Case length | 2.850 in (72.4 mm) | |
| Overall length | 3.600 in (91.4 mm) | |
| Case capacity | 113 gr H2O (7.345 cm³) | |
| Rifling twist | 1-10 in (254 mm) | |
| Primer type | Large rifle magnum | |
| Maximum pressure | 65,000 psi (450 MPa) | |
| Ballistic performance | ||
| Bullet weight/type | Velocity | Energy |
| 250 gr (16 g) PSP Bonded | 2,860 ft/s (870 m/s) | 4,540 ft·lbf (6,160 J) |
| 250 gr (16 g) PSP A-Frame | 2,860 ft/s (870 m/s) | 4,540 ft·lbf (6,160 J) |
| Test barrel length: 26" |
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The .338 Remington Ultra Magnum is a .338 caliber rifle cartridge introduced by Remington Arms in 2002. It is a beltless, rebated rim cartridge created by necking up the .300 Remington Ultra Magnum case to .338 caliber with no other changes. The .338 Remington Ultra Magnum is second only to the .338 Lapua Magnum and .338-378 Weatherby Magnum in cartridge-case capacity.
Handloaders should note that this cartridge already operates at very high pressures (65,000 PSI), significantly higher than standard rifle cartridges and higher even than most "magnums." This cartridge should not be "hot rodded," as many handloaders have done over the years with more conventional, lower pressure rounds.
