.378 Weatherby Magnum [SEP] designer
.378 Weatherby Magnum
The .378 Weatherby Magnum was designed by Roy Weatherby in 1953. It was an original belted magnum design with no parent case, inspired by the .416 Rigby and headspacing of the belted .375 H&H Magnum. The 215 magnum rifle primer was developed by Federal specifically for this round. The cartridge can hold upwards of 7.13 g (120 gr) of powder. The 378 Weatherby Magnum cartridge also has the double radius shoulder design found on the first and smaller proprietary line of Weatherby magnum cartridges.
The motivation behind
's full line up of calibers consists of the:
- .224 Weatherby Magnum
- .240 Weatherby Magnum
- .257 Weatherby Magnum
- 6.5-300 Weatherby Magnum
- .270 Weatherby Magnum
- 7mm Weatherby Magnum
- .300 Weatherby Magnum
- .340 Weatherby Magnum
- .30-378 Weatherby Magnum
- .338-378 Weatherby Magnum
- .375 Weatherby Magnum
- .378 Weatherby Magnum
- .416 Weatherby Magnum
- .460 Weatherby Magnum
Weatherby offers rifles chambered in:
- .17 HMR
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