Bullet: 220 gr HPBT  (Sierra)

Diameter: 

 

Powder: 20N29 (VihtaVuori)

Starting Powder: 110.2 gr

Max Powder: 117.9 gr

 

Primer:  Large Rifle Magnum

 

Case: Weatherby

Trim Length: 2.902"

 

Cartridge Overall Length: 3.661"

 

Starting Velocity: 2,868

Starting Pressure:  

Max Velocity: 3,077

Max Pressure:  

 

CAUTION: Loads less than the listed starting loads may cause excessive chamber pressure and must not be used!
Barrel: 26.5" with 1 in 10" twist.

 

Source: https://www.vihtavuori.com/reloading-data/rifle-reloading/?cartridge=18