.30-378 Weatherby Magnum
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The .30-378 Weatherby Magnum is a cartridge introduced by Weatherby in 1996 that uses the same case as the previously existing .378 Weatherby Magnum and .460 Weatherby Magnum, necked down to a .30 inch bullet. It is offered with bullets between 165 and 200 grains in factory loading, generating velocities up to 3500 ft/sec and muzzle energies over 4750 foot-pounds.[1]
The .30-378 case holds as much as 120 grains of powder without requiring a compressed load. This allows thie cartridge to develop more energy than the .458 Winchester Magnum, .300 Remington Ultra Magnum, and .300 Winchester Magnum. The .30-378 has comparable power to the larger .338 Lapua in military use.
Rifles built by Weatherby are available in .30-378, and ammunition is significantly more expensive than other cartridges. Weatherby offers this caliber in several versions of its Mark V rifle. Sako offeres the TRG-S also in .30-378 Weatherby.
[edit] Trivia
- The .30-378 Weatherby Magnum retains more power at 1/4 mile (402.3 meters), than the .30-06 round has when leaving the barrel.
