Current Rifle Cartridges
.375 Remington Ultra Magnum, aka .375 RUM
The .375 Remington Ultra Magnum
(.375" Caliber) was introduced in 2002
as one of the (now) 4 Remington Ultra
Magnum, joining the .300" .338" and 7mm
Remington Ultra Magnum.
All the Ultra Magnums are based  on the
.404" Jeffery case blown out and necked
down to except their different projectile
The .375 Remington Ultra Magnum
delivers 23 % more energy then the
.375 H&H  Magnum.
With velocities to over 3,200 Feet per
Second  and energy over 6,100 Foot
pounds per square inch and  projectiles
from 160 to 275 grains in weight, this
is an excellent long range hunting cartridge.
Above Picture on the right for size comparison:
Left to Right
7mm, .300, .338 and .375 Remington Ultra Magnums
Far Right:
.404 Jeffery, parent cartridge of the other 4 cartridges.