The 450 Bushmaster is a powerful, big bore rifle cartridge designed for hunting big game at short to medium ranges. The cartridge is based on the .284 Winchester case, which has been modified to fit a .452-inch bullet. The 450 Bushmaster delivers exceptional stopping power with its heavy, large diameter bullets, making it a popular choice for hunting deer, bear, and other large game in dense cover. The cartridge is also compatible with AR-15 platform rifles, allowing for a lightweight, portable hunting rifle that can handle heavy recoil and deliver quick follow-up shots.

The 450 Bushmaster cartridge produces a muzzle velocity of around 2,200 feet per second and a muzzle energy of up to 2,700 foot-pounds, depending on the load. It uses a straight-walled case that is legal for hunting in many states that have restrictions on the use of bottlenecked cartridges. The cartridge's popularity has grown in recent years, with many hunters and gun enthusiasts opting for the 450 Bushmaster over other big bore cartridges due to its versatility, accuracy, and ease of use. Overall, the 450 Bushmaster is a reliable and effective cartridge that offers excellent performance for hunting big game in a variety of conditions.