The .375 Remington Ultra Magnum is the dangerous game member of the Remington Ultra Magnum family, joining the .300 RUM, .338 RUM, and 7mm RUM. Its rebated-rim case provides a large powder capacity exceeding the .375 H&H Magnum while fitting a standard-length bolt face.
Type: Rifle
Introduced: 2002, USA
Standardization: SAAMI
Bullet diameter: 0.375" (9.53 mm)
Case length: 2.85" (72.39 mm)
Overall length: 3.6" (91.44 mm)
Rim type: Rebated
Primer: Large Rifle Magnum
Muzzle velocity: 2700–2900 fps
Muzzle energy: 4372–5605 ft-lbs
Effective range: 300 yd
Common bullet weights: 270, 300 gr
Primary use: hunting, dangerous_game
Production status: Active
Also known as: .375 RUM · 375 RUM · 375 Remington Ultra Magnum
History: Introduced by Remington in 2002, the .375 RUM completed the Ultra Magnum family with a dangerous game option for hunters pursuing African or large North American game. It shares the rebated-rim case architecture of the other RUM cartridges, allowing use in a standard bolt face while providing more case capacity than the belted .375 H&H. The Remington Model 700 is the primary production rifle…
Notable firearms: Remington Model 700, Ruger No. 1
Similar cartridges: .375 H&H Magnum, .378 Weatherby Magnum, .375 Dakota