Bullet: 750 gr Banded Solids  (Barnes)

Diameter: 0.577"

 

Powder: Reloder 15 (Alliant Powder)

Starting Powder: 112.0 gr

Max Powder: 119.0 gr

 

Primer: FED 215m

 

Case: Bertram

Trim Length: 2.990"

 

Cartridge Overall Length: 3.675"

 

Starting Velocity: 1,868

Starting Pressure:  

Max Velocity: 2,045

Max Pressure:  

 

*Rifles chambered for this cartridge had varying bore and groove diameters before CIP standardized the specs. Barnes’ .577 NE bullets are designed for modern firearms in good conditions built to current specs. If in doubt, contact the firearm manufacturer or a competent gunsmith to ensure your rifle is safe to use with modern loads. *When reloading this cartridge, use a heavy crimp to ensure proper neck tension.
Barrel: 25.81" with 1:18" twist.

 

Source: https://www.barnesbullets.com/wp-content/uploads/2021/05/577NitroExpress.pdf