.338-378 Weatherby Magnum
The Weatherby Collection
This massive cartridge was built and factory chambered by Weatherby in 1999, by
necking down the huge .378 Weatherby magnum case to accept .338 projectiles.
This cartridge is loaded with 250 to 300 grain projectiles and produces over 5,000
Foot Pounds of Energy with Velocities over 3,000 Feet per Second.