The .300 Winchester Magnum, left, shown with the .300 H&H and .300 Weatherby Magnum.  Introduced in 1963 as the replacement for the old-fashioned .300 H&H, the .300 Win. Mag. is faster than the H&H, but not as fast as the .300 Weatherby Magnum.  It is also much more available, and develops noticeably less recoil.
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