Home Forums Reloading Big Game Rifles 300 Savage - Powder Weight using RamShot "Big Game"?

Going to load some .300 Savage rounds using the following:

Brass: Win Super (New)
Primers: CCI250 Large Rifle Primers (Magnum - only ones available)
Bullet: Hornady 150gr SST Boat Tail (.308 diameter)
Powder: RamShot 'Big Game'

I need to know a powder weight for the above. RamShot publishes data for .30-30, .308, .30-06, .300 Win Short Magnum, Rem Short Action Ultra, Winchester Magnum, Weatherby Magnum, Rem Ultra Mag, 30-378 Weatherby Magnum and 303 British. I can not find any data for the 300 Savage using Big Game. As the .308 is a slightly larger case, can I use that data reducing my powder charge by 2% or keep the same data? If not advisable, what charge weight sould I use.

Any ideas?

Thanks