.375 Remington Ultra Magnum

.375 Remington Ultra Magnum
Type	Rifle
Place of origin	United States
Production history
Designer	Remington
Designed	2000 [1]
Specifications
Parent case	.300 Remington Ultra Magnum [1]
Case type	Beltless, 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 length	2.850 [1]
Overall length	3.600 in (91.4 mm)
Rifling twist	1-12"
Primer type	Large rifle magnum
Maximum pressure	65,000 psi (450 MPa)
Maximum CUP	< !-- Ballistic performance --> CUP
Ballistic performance
Bullet mass/type Velocity Energy 235 gr (15 g) SP 3,148 ft/s (960 m/s) 5,172 ft⋅lbf (7,012 J) 250 gr (16 g) SBT 3,036 ft/s (925 m/s) 5,118 ft⋅lbf (6,939 J) 260 gr (17 g) Partition 2,970 ft/s (910 m/s) 5,094 ft⋅lbf (6,907 J) 270 gr (17 g) SP 2,941 ft/s (896 m/s) 5,187 ft⋅lbf (7,033 J) 300 gr (19 g) RN 2,945 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]

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.^{[ citation needed ]}

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.^{[ citation needed ]}

See also

• List of rifle cartridges
• 9 mm caliber other cartridges of similar size.
• Table of handgun and rifle cartridges

References

1. "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. "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. "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.

External links

• Cartridge Dimensions