The .300 Weatherby Magnum, or 300 WBY for short, is a powerful rifle cartridge developed by Roy Weatherby in 1944. It is a popular choice among hunters and long-range shooters due to its high velocity, flat trajectory, and excellent accuracy. The 300 WBY uses a .30 caliber bullet and is capable of delivering energy at long distances, making it an ideal choice for big game hunting and shooting competitions.

The 300 WBY is capable of firing bullets that range from 150 to 220 grains, and it has a maximum effective range of around 1,000 yards. The cartridge is designed to deliver high velocity and flat trajectory, which makes it effective in long-range hunting and shooting scenarios. The 300 WBY is known for its excellent accuracy and consistency, making it a favorite among shooters who demand high performance from their firearms. Overall, the 300 WBY is a powerful and versatile cartridge that can be used for a wide range of shooting applications, from long-range target shooting to big game hunting in the most challenging environments.