.378 Weath. Mag.

The .378 Weatherby Magnum (378 Wby Mag) is a rifle cartridge developed by Roy Weatherby in 1953. It is a belted, bottlenecked cartridge with a bullet diameter of .375 inches (9.5mm) and a case length of 2.913 inches (74mm).

The 378 Wby Mag is known for its extreme power, high velocity, and flat trajectory, making it a popular choice among long-range hunters and shooters. It is capable of firing heavy, high-BC bullets at extremely high velocities, resulting in exceptional long-range accuracy and terminal ballistics.

The cartridge is suitable for hunting the world's largest and most dangerous game, such as cape buffalo and elephant, as well as for long-range target shooting. However, due to the cartridge's high velocity and energy, it generates significant recoil, which can be challenging for some shooters to manage.

The 378 Wby Mag is typically used in rifles with strong actions and heavy barrels to handle the high pressures generated by the cartridge. Overall, the 378 Wby Mag is considered one of the most powerful and versatile cartridges for big game hunting and long-range shooting, and it has a loyal following among hunters and shooters who value its performance and reliability.