.375 Remington Ultra Magnum

.375 Remington Ultra Magnum

Infobox Firearm Cartridge
name= .375 Remington Ultra Magnum


caption=
origin= USA
type= Rifle
service=
used_by=
wars=
designer= Remington
design_date=2002
manufacturer=
production_date=
number=
variants=
is_SI_specs=
parent=.300 Remington Ultra Magnum
case_type=Beltless, rebated, bottleneck
bullet=.375
neck=.4050
shoulder=.5250
base=.5500
rim_dia=.534
case_length=2.850
length=3.600
rifling=1-12"
primer=Large rifle magnum
max_pressure=65000
max_cup=
is_SI_ballistics=
bw1=235
btype1=SP
vel1=3148
en1=5172
bw2=250
btype2=SBT
vel2=3036
en2=5118
bw3=260
btype3=Partition
vel3=2970
en3=5094
bw4=270
btype4=SP
vel4=2941
en4=5187
bw5=300
btype5=RN
vel5=2799
en5=5220
test_barrel_length=24"
balsrc= Accurate Powder [http://www.accuratepowder.com/data/PerCaliber2Guide/Rifle/Standarddata(Rifle)/375Cal(9.53 mm)/375%20RUM%20Remington%20Ultra%20Magnum%20new%20data.pdf .375 RUM data from Accurate Powder] ]
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)." [http://www.chuckhawks.com/subscribers/rifle_cartridge_page/375UltraMag.htm The .375 Remington Ultra Mag] " by Chuck Hawks]

General info

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.

ee also

* List of rifle cartridges
* 9 mm caliber other cartridges of similar size.

References


* [http://www.stevespages.com/jpg/cd375remingtonultramag.jpgCartridge Dimensions]


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