This specific ammunition refers to cartridges loaded with projectiles weighing 405 grains, designed for firearms chambered in .458 caliber. A grain is a unit of measurement for projectile weight, and .458 represents the bore diameter of the firearm’s barrel. This combination typically signifies a powerful round intended for large game hunting or dangerous game control.
Heavy projectiles of this caliber deliver significant energy upon impact, offering hunters the stopping power necessary to ethically harvest thick-skinned and potentially dangerous animals. Historically, such cartridges played a crucial role in African safaris and other expeditions involving large, resilient game. The substantial momentum generated by these rounds contributes to their effectiveness in penetrating deep tissue and bone. This characteristic, coupled with careful shot placement, ensures a humane and swift harvest.