The .338 Remington Ultra Magnum is a .338 caliber

rifle A rifle is a long-barreled firearm designed for accurate shooting, with a barrel that has a helical pattern of grooves ( rifling) cut into the bore wall. In keeping with their focus on accuracy, rifles are typically designed to be held with ...

cartridge Cartridge may refer to: Objects * Cartridge (firearms), a type of modern ammunition * ROM cartridge, a removable component in an electronic device * Cartridge (respirator), a type of filter used in respirators Other uses * Cartridge (surname) Ca ...

introduced by

Remington Arms Remington Arms Company, LLC was an American manufacturer of firearms and ammunition, now broken into two companies, each bearing the Remington name. The firearms manufacturer is ''Remington Arms''. The ammunition business is called ''Remingto ...

in 2002.

Design

It is a beltless, rebated rim cartridge based on the

.300 Remington Ultra Magnum The .300 Remington Ultra Magnum, also known as the .300 Ultra Mag, 7.62×72mm or .300 RUM is a 7.62 mm (.308 inch) rifle cartridge introduced by Remington Arms in 1999. The .300 Remington Ultra Magnum is one of the largest commercially ava ...

case shortened .090" and necked-up to accept a 0.338-inch (.338 caliber) bullet. The .338 Remington Ultra Magnum has a similar case capacity as the

.338 Lapua Magnum The .338 Lapua Magnum (8.6×70 mm or 8.58×70 mm) is a rimless, bottlenecked, centerfire rifle cartridge. It was developed during the 1980s as a high-powered, long-range cartridge for military snipers. It was used in the War in Afghanistan and ...

and somewhat lower than that of the

.338-378 Weatherby Magnum The .338-378 Weatherby Magnum started out as the wildcat cartridge, .338-378 Keith-Thomson Magnum during the early 1960s. Keith and Thomson are Elmer Keith and R.W. "Bob" Thomson. The 338-378 Keith-Thomson Magnum is a quarter of an inch short ...

. It is one of the most powerful .338-caliber rounds in production. Because this cartridge already operates at very high pressures (65,000 PSI), handloaders cannot realize significant velocity improvements over factory ammunition as many handloaders have done over the years with more conventional, lower pressure rounds. However, they can still tune their own loads for best precision in their specific rifles, as with any other cartridge.

References

External links

.338 Remington Ultra Magnum reloading data at accuratepowder.com BROKEN.338 Remington Ultra Magnum case diagram
Pistol and rifle cartridges Magnum rifle cartridges Remington Ultra Magnum rifle cartridges {{ammo-stub

Design

See also

References

External links