This specific firearm is a variant of the .280 Remington cartridge, enhanced for improved ballistic performance. The modification involves altering the case to a sharper shoulder angle and a 40-degree shoulder, resulting in a greater powder capacity. This translates to higher muzzle velocities and flatter trajectories, making it effective for long-range hunting.
The increased velocity and flatter trajectory contribute to greater downrange energy retention, leading to more effective terminal performance on game animals. This advantage makes this cartridge popular among hunters pursuing medium to large-sized game, particularly in open country where long shots are common. Development of this improved cartridge reflects the ongoing pursuit of enhanced accuracy and effectiveness in hunting firearms.