This specific ammunition designation refers to a centerfire, straight-walled cartridge originally developed for the Springfield Model 1873 “Trapdoor” rifle. The .45 caliber projectile, propelled by 70 grains of black powder, quickly gained popularity among hunters of large game in North America. Modern iterations often use smokeless powder and a variety of bullet types, including jacketed soft points and expanding hollow points, making it suitable for a wide range of hunting scenarios. Specific loadings designed for increased resistance to moisture and temperature fluctuations ensure reliable performance in diverse climatic conditions.
The enduring popularity of this classic cartridge stems from its significant stopping power and versatility. Its relatively large caliber and heavy bullet construction deliver substantial energy transfer, making it effective for harvesting large, thick-skinned animals. The widespread availability of both firearms and ammunition, coupled with a long history of proven performance, contributes to its continued use by hunters and sport shooters. Its enduring presence in the market signifies a sustained demand and relevance within the hunting and shooting communities.