Bullet: 140 gr TSX  (Barnes)

Diameter: 0.284"

 

Powder: IMR 4350 (Improved Military Rifle)

Starting Powder: 51.0 gr

Max Powder: 54.5 gr

 

Primer: FED 210m

 

Case: WIN

Trim Length: 2.160"

 

Cartridge Overall Length: 2.860"

 

Starting Velocity: 2,701

Starting Pressure:  

Max Velocity: 2,909

Max Pressure:  

 

*SAAMI specifies a maximum overall length (C.O.A.L.) for this cartridge at 2.800”. *Barnes load data was developed with cartridge overall lengths that are over SAAMI C.O.A.L. *This Cartridge may be loaded to a slightly longer length if your rifle’s magazine and throat are long enough to accommodate the extra length. *If loading to 2.800” C.O.A.L., lightly crimp case mouth so it contacts the bullet ogive. *Tipped bullets must be loaded to at least a 2.900” C.O.A.L.
Barrel: 24" with 1:10" twist.

 

Source: https://www.barnesbullets.com/wp-content/uploads/2021/05/284-Winchester.pdf