The .338-378 Weatherby is a high-performance magnum rifle cartridge known for its impressive velocity, long-range accuracy, and massive energy transfer. Developed by Roy Weatherby, this powerful round is popular among long-range shooters and big game hunters. With a case capacity of over 100 grains of powder, the .338-378 WBY delivers exceptional terminal ballistics and flat trajectory, making it ideal for taking down large and dangerous game at extended distances. Its impressive stopping power and exceptional long-range performance have made it a favorite among serious hunters and shooting enthusiasts seeking unmatched power and precision in a rifle cartridge.