Bullet: 200 gr TSX  (Barnes)

Diameter: 0.308"

 

Powder: IMR 7828 SSC (Improved Military Rifle)

Starting Powder: 54.5 gr

Max Powder: 61.0 gr

 

Primer: FED 215m

 

Case: REM

Trim Length: 2.005"

 

Cartridge Overall Length: 2.825"

 

Starting Velocity: 2,344

Starting Pressure:  

Max Velocity: 2,620

Max Pressure:  

 

*The 130-grain TSX has a very short shank. We recommend lightly crimping the case mouth with a factory crimp-style die to increase neck tension. *Powder charges of less than 100 percent density are recommended when loading 165-grain Banded Spitzers, because of the length of the bullets.
Barrel: 24" with 1:10" twist.

 

Source: https://www.barnesbullets.com/wp-content/uploads/2021/05/300RSAUMWeb.pdf