Load Data for .257 Weatherby Magnum


 
Bullet: 90 gr CX  (HDY)
Diameter: 0.257"
 
Powder: Grand (Ramshot)
Starting Powder: 66.2 gr
Max Powder: 73.6 gr
 
Primer: FED 215
 
Case: Weatherby
Trim Length: 2.535"
 
Cartridge Overall Length: 3.182"
 
Starting Velocity: 3,155
Starting Pressure: 43,300
Max Velocity: 3,566
Max Pressure: 60,100
 
Barrel: 26" with 1:10" twist.
 
Source: https://www.hodgdonreloading.com/
 

Printed from Shooter's Reference on 07/21/2025:
https://www.shootersreference.com/reloadingdata/257-weatherby-magnum/