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| .375 Remington Ultra Magnum Type Rifle Place of origin USA colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Production history Designer Remington Designed 2002 colspan="3" style="background: lightsteelblue; text-align: center; vertical-align: middle;"
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| Specifications Parent case .300 Remington Ultra Magnum Case type Beltless, rebated, bottleneck Bullet diameter .375 in (Expression error: Unexpected < operator.
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 mm
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Neck diameter .4050 in (Expression error: Unexpected < operator.
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 mm
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Shoulder diameter .5250 in (Expression error: Unexpected < operator.
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 mm
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Base diameter .5500 in (Expression error: Unexpected < operator.
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 mm
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Rim diameter .534 in (Expression error: Unexpected < operator.
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 mm
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Case length 2.850 in (Expression error: Unexpected < operator.
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 mm
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Overall length 3.600 in (Expression error: Unexpected < operator.
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 mm
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Rifling twist 1-12" Primer type Large rifle magnum Maximum pressure 65,000 psi (Expression error: Unexpected < operator.
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 MPa
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| Ballistic performance Bullet weight/type Velocity Energy style="vertical-align:middle; border-bottom: 1px dotted #aaa;
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" | 235 gr (Expression error: Unexpected < operator.
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"|3,148 ft/s (Expression error: Unexpected < operator.
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" | 250 gr (Expression error: Unexpected < operator.
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"|3,036 ft/s (Expression error: Unexpected < operator.
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" | 260 gr (Expression error: Unexpected < operator.
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Test barrel length: 24"
Source: Accurate Powder [1]

The .375 Remington Ultra Magnum, also known as the .375 RUM is a .375 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 .375 caliber with no other changes. The .375 Remington Ultra Magnum is second only to the .378 Weatherby Magnum in cartridge-case capacity. Factory loadings are strong, but relatively sedate when one considers the true potential of the cartridge. Remington factory loads push a 300 grain (19 g) bullet at 2760 ft/s (840 m/s), producing 5070 ft·lbf (6.88 kJ) of energy. A handloader can increase the muzzle velocity of this bullet to a maximum of 2950 ft/s (900 m/s,) developing 5800 ft·lbf (7.9 kJ).[2]

General infoEdit

The primary use of this cartridge should be hunting large, thick-skinned game. It is powerful enough to kill almost any animal and, with its high velocity, can do so at fairly long ranges. One should note that such performance comes at the price of a heavy recoil: in a sporting-weight rifle of ~8 lb (3.6 kg), this cartridge can produce a fierce 80 ft·lbf (108 J) of recoil (approximately 3.5 times that of a .30-06.) This is well beyond the limits of most shooters.

There is a good selection of .375 in (9.53 mm) bullets available that are suited to the high velocities of the .375 RUM, and boat tail bullets help to further extend the useful range.

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.

Currently, only Remington and Savage furnish production rifles in this chambering. Remington and Nosler are the only source of factory ammunition. Loading dies and reloading data are readily available to the handloader.

CategoriesEdit

Cartridge:rifles
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