The .240 Weatherby Magnum is a high-velocity, flat-shooting rifle cartridge developed by Roy Weatherby in 1968. It is based on a .30-06 Springfield case, necked down to .243 caliber. Known for its excellent accuracy and long-range capabilities, the .240 Weatherby Magnum is popular among hunters and long-range shooting enthusiasts. It is particularly well-suited for medium-sized game such as deer and antelope, where its high velocity ensures a flat trajectory and effective terminal ballistics. The cartridge typically propels a 85 to 100-grain bullet at velocities ranging from 3,100 to 3,400 feet per second, delivering superior performance compared to more traditional .243 cartridges.