.375 Remington Ultra Magnum

Last updated
.375 Remington Ultra Magnum
Type Rifle
Place of origin United States
Production history
Designer Remington
Designed2000 [1]
Specifications
Parent case .300 Remington Ultra Magnum [1]
Case typeBeltless, rebated-rim, bottleneck
Bullet diameter.375 in (9.5 mm)
Neck diameter.4050 [1]
Shoulder diameter.5250 in (13.34 mm)
Base diameter.5500 in (13.97 mm)
Rim diameter.534 [1]
Case length2.850 [1]
Overall length3.600 in (91.4 mm)
Rifling twist1-12"
Primer typeLarge rifle magnum
Maximum pressure65,000 psi (450 MPa)
Maximum CUP< !-- Ballistic performance --> CUP
Ballistic performance
Bullet mass/typeVelocityEnergy
235 gr (15 g) SP3,148 ft/s (960 m/s)5,172 ft⋅lbf (7,012 J)
250 gr (16 g) SBT3,036 ft/s (925 m/s)5,118 ft⋅lbf (6,939 J)
260 gr (17 g) Partition2,970 ft/s (910 m/s)5,094 ft⋅lbf (6,907 J)
270 gr (17 g) SP2,941 ft/s (896 m/s)5,187 ft⋅lbf (7,033 J)
300 gr (19 g) RN2,945 ft/s (898 m/s)5,760 ft⋅lbf (7,810 J)
Test barrel length: 26
Source(s): Alliant Powder [2]

The .375 Remington Ultra Magnum, also known as the .375 RUM is a .375 rifle cartridge introduced by Remington Arms in 2000. The cartridge is intended for large and dangerous game. [1]

Contents

It is a beltless, rebated rim cartridge created by necking up the .300 Remington Ultra Magnum case to .375 caliber with no other changes. [1] Factory loadings are less powerful than handloads for the cartridge. Remington factory loads produce 2,760 ft/s (840 m/s) [3] with a 300 grain (19 g) bullet for 5,070 ft·lbf (6.88 kJ) of muzzle energy.

General information

The intended use of this cartridge includes hunting large, thick-skinned game. [1] It is powerful enough to kill any land animal [1] and, with its high velocity, can do so at fairly long ranges. 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.)

There is a wide selection of .375 in (9.53 mm) bullets available [1] [3] [4] that are suited to the high velocities of the .375 RUM, and boat tail bullets help to further extend the useful range.

Currently, there are no production rifles in this chambering (Savage & Remington previously did so.) Remington, [3] DoubleTap [5] and Nosler [4] are the only sources of factory ammunition. Loading dies and reloading data are readily available to the handloader. Double Tap loads to the specifications attributed to handloader limits.

See also

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<span class="mw-page-title-main">.257 Weatherby Magnum</span> Rifle cartridge

The .257 Weatherby Magnum is a .257 caliber (6.53 mm) belted bottlenecked cartridge. It is one of the original standard length magnums developed by shortening the .375 H&H Magnum case to approx. 2.5 in (64 mm). Of the cartridges developed by Roy Weatherby, the .257 Weatherby Magnum was known to have been his favorite, and the cartridge currently ranks third in Weatherby cartridge sales, after the .30-378 Weatherby Magnum and the .300 Weatherby Magnum.

<span class="mw-page-title-main">.300 Winchester Magnum</span> Rifle cartridge

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<span class="mw-page-title-main">.257 Roberts</span> Rifle cartridge

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<span class="mw-page-title-main">.404 Jeffery</span> Rifle cartridge

The .404 Jeffery is a rifle cartridge designed for hunting large, dangerous game animals, such as the "Big Five" of Africa. The cartridge is standardized by the C.I.P. and is also known as .404 Rimless Nitro Express. It was designed in 1905 by London based gunmaker W.J. Jeffery & Co to duplicate the performance of the .450/400 Nitro Express 3-inch in bolt-action rifles. The .404 Jeffery fired a bullet of .422 in (10.72 mm) diameter of either 300 gr (19 g) with a muzzle velocity of 2,600 ft/s (790 m/s) and muzzle energy of 4,500 foot-pounds force (6,100 N⋅m) or 400 gr (26 g) with a muzzle velocity of 2,150 ft/s (660 m/s) and 4,100 foot-pounds force (5,600 N⋅m) of energy. It is very effective on large game and is favored by many hunters of dangerous game. The .404 Jeffery was popular with hunters and game wardens in Africa because of its good performance with manageable recoil. By way of comparison, the .416 Rigby and .416 Remington Magnum cartridges fire .416 in (10.57 mm) bullets of 400 gr at 2,400 feet per second (730 m/s) with a muzzle energy of approximately 5,000 foot-pounds force (6,800 N⋅m). These cartridges exceed the ballistic performance of the .404 Jeffery but at the price of greater recoil and, in the case of the .416 Rigby, rifles that are more expensive.

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<span class="mw-page-title-main">.338 Remington Ultra Magnum</span> Rifle cartridge

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<span class="mw-page-title-main">.375 Weatherby Magnum</span> Rifle cartridge

The .375 Weatherby Magnum (9.5×73mmB) is a medium-bore rifle cartridge. The cartridge is blown out, improved and provided with the Weatherby double radius shoulder – given the Weatherby treatment – version of the .375 H&H Magnum. Unlike other improved versions of the .375 H&H Magnum like the .375 Ackley Improved, the .375 Weatherby Magnum is not a wildcat and existed as a proprietary cartridge until the CIP published specifications for the cartridge.

Nosler produces six different rebated rim hunting cartridges. The first to be introduced was .26 Nosler, followed by .28 Nosler, .30 Nosler, .33 Nosler, .22 Nosler, and .27 Nosler.

References

  1. 1 2 3 4 5 6 7 8 9 10 "375 Remington Ultra Mag" (PDF). Barnes Bullets. Barnes Bullets, LLC. 38 N Frontage Rd Mona, UT 84645. Archived from the original (PDF) on 2014-08-11. Retrieved 2014-07-26.
  2. "Alliant Powder - Reloaders' Guide". Alliant Powder. Alliant Powder 2299 Snake River Avenue Lewiston, ID 83501. 2014.
  3. 1 2 3 "PREMIER A-FRAME". Remington. Remington Arms Company, LLC 870 Remington Drive P.O. Box 700 Madison, NC 27025-0700. 2014. Archived from the original on 2014-07-26. Retrieved 2014-07-23.
  4. 1 2 "Ammunition-Nosler". Nosler. Nosler Inc. 107 SW Columbia St. Bend, OR 97702. 2014. Archived from the original on 2014-07-16. Retrieved 2014-07-24.
  5. "375 Remington Ultra Mag". DoubleTap Ammunition. DoubleTap Ammunition 646 S. Main St. #333 Cedar City, UT 84720. 2014. Retrieved 2014-07-24.