Load Data for .300 RUM (Remington Ultra Magnum)


 
Bullet: 212 gr LRX  (Barnes)
Diameter: 0.308"
 
Powder: Retumbo (Hodgdon)
Starting Powder: 84.8 gr
Max Powder: 90.2 gr
 
Primer: FED 215
 
Case: REM
Trim Length: 2.840"
 
Cartridge Overall Length: 4.225"
 
Starting Velocity: 2,854
Starting Pressure:  
Max Velocity: 3,023
Max Pressure:  
 
212gr LRX BT requires 1:8" twist or faster.
Barrel: 24" with 1:8" twist.
 
Source: https://www.barnesbullets.com/wp-content/uploads/2021/05/300-Rem-Ultra-Mag.pdf
 

Printed from Shooter's Reference on 11/21/2024:
https://www.shootersreference.com/reloadingdata/300-rum-remington-ultra-magnum/