This specific ammunition refers to cartridges loaded with projectiles weighing 405 grains, designed for the .45-70 Government rifle cartridge. A grain is a unit of measurement for projectile weight, and 405 grains is a common and historically significant weight for this caliber. The .45-70 Government, a centerfire rifle cartridge developed in 1873 for the U.S. Army’s “Trapdoor” Springfield rifle, remains popular among hunters and enthusiasts today.
Historically, this ammunition played a crucial role in American history, used extensively for hunting large game like bison and elk, and serving in military conflicts. Its continued relevance stems from its effectiveness on large game at moderate ranges and its suitability for lever-action and single-shot rifles. The substantial weight of the projectile contributes to significant energy transfer upon impact.