[2] However, being introduced 18 years earlier, the 7mm Weatherby Magnum due to the case design delivers a slight edge over the more popular 7mm Rem Mag in terms of ballistics.

But since it is fed from a similar action length, the Remington was available in cheaper more plentiful rifles giving it a significant boost in popularity that continues to this day.

Once the 7mm Rem Mag was introduced, manufactured with 1:9 1/4" barrels, Roy Weatherby decided to modify the twist for a 1:10.

[3] The 7mm Weatherby Magnum is a very adequate cartridge for hunting medium to large-sized deer such as mule deer, wapiti and moose, up to long ranges due to its plain trajectory with bullets of different weights and due to the high ballistic coefficient the 7mm bullets are praised for.

However, with adequately constructed bullets, the 7mm Wby Mag may be used for hunting larger game, including the great bears and the American bison.