This specific cartridge is a modification of the .280 Remington, featuring a sharper shoulder angle and a 40-degree shoulder, resulting in a slightly larger case capacity. This allows for higher velocities and flatter trajectories compared to its parent cartridge, making it a popular choice among long-range shooters. A common application involves the chambering of rifles intended for hunting medium to large-sized game.
The enhanced ballistic performance offers several advantages. Increased muzzle velocity translates to greater downrange energy, leading to cleaner kills and improved effectiveness at longer distances. The flatter trajectory reduces the need for holdover adjustments, simplifying aiming and increasing accuracy. Developed in the mid-20th century as a wildcat cartridge, it gained recognition for its performance improvements over the standard .280 Remington and has since established itself as a respected choice, particularly within the hunting community.