.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"

The .338 Remington Ultra Magnum is a .338 caliber rifle cartridge introduced by Remington Arms in 2002. It is a beltless, rebated rim cartridge based on the .300 Remington Ultra Magnum case shortened .090" loaded with a .338 caliber bullet. 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.

[edit] See also

• List of rifle cartridges

[edit] References

This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (April 2009)

[edit] External links

• .338 Remington Ultra Magnum reloading data at accuratepowder.com