.375 RUM

 
.375 RUM
 
 

In 2001 Remington introduced their .375 Remington Ultra Mag, which is based on the .300 Ultra Mag case necked up to accept .375" diameter bullets. Like the .300 Ultra Mag, this huge beltless cartridge is loosely based on the British .404 Jeffery Rimless elephant rifle case, and uses a rebated rim design to allow it to mate with standard magnum size bolt faces. The .375 Ultra requires a long magnum action. Remington factory loads include a 270 grain bullet at a claimed muzzle velocity (MV) of 2,900 fps and 5,041 ft. lbs. of muzzle energy (ME), and a 300 grain bullet at a MV of 2,760 fps and ME of 5073 ft. lbs. At 200 yards the 300 grain bullet is traveling at 2263 fps and retains 3412 ft. lbs. of energy. These figures were developed in a 24" test barrel. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.

   
Bullet weight: Bullet name: Powder:  

 
Not yet verified user loads  
ID: Bullet weight: Bullet name: Powder:  
300 grs
Winchester/Nosler Combined Tech
RL15
265 grs
AERO 375 - 265
Vitha N550
250 grs
Sierra SBT
IMR 4350
300 grs
Sierra SBT
XMR 3100
300 grs
Sierra SBT
RE-22
250 grs
Sierra SBT
H-4350 EXT
250 grs
Sierra SBT
MagPro
250 grs
Sierra SBT
H-1000
300 grs
Sierra SBT
IMR 4831
300 grs
Sierra SBT
H-1000
300 grs
Sierra SBT
WXR
260 grs
Nosler Accubond
IMR 7828
300 grs
Nosler Partition
H-1000
260 grs
Nosler Accubond
H-1000
260 grs
Accubond
IMR7828
260 grs
Accubond
IMR 4350
275 grs
bitteroot bonded
imr4831
250 grs
barnes TTsx
reloader-22
235 grs
TSX
R19
270 grs
TSX
R22
260 grs
Nosler Accubond
IMR 4350
235 grs
barnes TTSX FB
Hunter
235 grs
barnes TTSX FB
RL19
250 grs
250 sierra game king
rl 17