History of the .340 Wby. Mag .

 
Introduced in 1963, the .340 Weatherby was designed as a
response to the .338 Winchester Mag. However, Roy took
advantage of the longer case to pack in more powder for greater
velocity. And, it shoots heavier .338 bullets at higher velocities as
well—a decidedly powerful combination. Ideally suited for animals
the size of elk or larger, the .340 can also be used by deer hunters
with lighter bullet weights.

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