Load Data for .223 WSSM (Winchester Super Short Magnum)

 
Bullet: 55 gr MPG  (Barnes)
Diameter: 0.224"
 
Powder: IMR 4350 (Improved Military Rifle)
Starting Powder: 41.5 gr
Max Powder: 45.5 gr
 
Primer: FED 210m
 
Case: WIN
Trim Length: 1.660"
 
Cartridge Overall Length: 2.160"
 
Starting Velocity: 3,625
Starting Pressure:  
Max Velocity: 3,886
Max Pressure:  
 
Recommended Twist 1:9” or Faster
Barrel: 24" with 1:10" twist.
 
Source: https://www.barnesbullets.com/wp-content/uploads/2021/05/223-WSSM.pdf
 
Printed from Shooter's Reference on 12/21/2024:
https://www.shootersreference.com/reloadingdata/223-wssm-winchester-super-short-magnum/