.338 Remington Ultra Magnum

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.338 Remington Ultra Magnum
.338 Remington Ultra Magnum Round
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	.5261 in (13.36 mm)
Base diameter	.5500 in (13.97 mm)
Rim diameter	.534 in (13.6 mm)
Case length	2.760 in (70.1 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.

Because this cartridge already operates at very high pressures (65,000 PSI), Handloaders cannot give significant improvements over factory ammunition as many handloaders have done over the years with more conventional, lower pressure rounds.

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This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. Please improve this article by introducing more precise citations. (September 2010)

v t e Remington Firearms and Cartridges

Handguns	Model 95 Model 51 Remington XP-100 Remington 1911 R1 Model 1858 Model 1875

Rifles	Model 4 Model 5 Model 6 Model 8 Model 14 Model 241 Model 30 Model 41 Model 121 Model 504 Targetmaster 510 Scoremaster 511 Sportsmaster 512 Matchmaster 513 JuniorTarget 521TL Model 541 Model 550-1 Model 552 Model 591 Model 592 Model 600 Model 673 Model 700 Model 710 Model 721 Model 722 Model 725 Model 760 Model 770 Model 788 Model 798 Model 799 Model 7400 Model 7600 Model 7615 Mohawk 10C Nylon 10 Nylon 11 Nylon 12 Nylon 66 Nylon 76 Nylon 77 Nylon 77 Nylon 77 Nylon 77 Nylon 77 Remington R-15 Remington R-25 Model XB-40 Berthier rifle M1903 Springfield Rifle Remington-Keene rifle Mosin Nagant Model Six Model Seven

Shotguns	Model 10 Model 11 Model 50 Model 870 887 Nitro Mag Model 1100 Model 11-48 Model 11-87 Remington Model SP-10 Versa Max

Cartridges	.17 Remington 5mm Remington Magnum Rimfire .22 BR .22 Remington Jet .221 Remington Fireball .222 Remington .222 Remington Magnum .223 Remington .22-250 Remington 6mm BR 6mm Remington .25 Remington .25-06 Remington .260 Remington 6.5mm Remington Magnum 7mm BR Remington 7mm-08 Remington .280 Remington 7 mm Remington Magnum 7mm Remington Short Action Ultra Magnum .30 Remington .300 Remington Short Action Ultra Magnum .300 Remington Ultra Magnum .32 Remington 8mm Remington Magnum .338 Remington Ultra Magnum 7 mm Remington Ultra Magnum .35 Remington .375 Remington Ultra Magnum .416 Remington Magnum .44 Remington Magnum

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