.340 Weatherby Magnum [SEP] designer
.340 Weatherby Magnum
The .340 Weatherby Magnum rifle cartridge was introduced in 1962 by creator Roy Weatherby to fill the gap between the .300 Weatherby Magnum and the .378 Weatherby Magnum, and in response to the .338 Winchester Magnum released in 1958. 
The .340 Weatherby Magnum uses the same .338 in. diameter bullets as the .338 Winchester Magnum, but it does so at greater velocity than its Winchester competition. Reloaders may have trouble matching the published Weatherby velocities as Weatherby factory ammunition is loaded to maximum specifications. Weatherby no longer loads the
'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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