The Rangemaster 338 rifle is the most powerful rifle in the game. It can easily kill large animals such as Bisons or Moose with one shot. Due to it's large caliber and rough power, its only suitable for big game hunt.
Despite the in-game description claiming it's the ideal weapon for bears, and a popular choice for guides in bear country, the rifle provides a 100% integrity bonus only for Roosevelt Elks, Moose and Bison.
As for all rifles, two variants of its ammunition are available:
A very powerful and durable weapon built for the most extreme conditions. The .338 cartridge, combined with state-of-the-art weapon technology, makes this weapon ideal for very large game such as moose and bear. With its proven stopping power, .338 has become a popular choice among guides and outfitters that make their living in bear hunt.