The .45-70 rifle cartridge, also known as .45-70 Government, was developed at the U.S. Army's Springfield Armory for use in the Springfield Model 1873, which is known to collectors as the "Trapdoor Springfield".
.45-70 или .45-70 Government — устаревший американский винтовочный патрон центрального воспламенения разработанный специалистами Спрингфилдского арсенала под винтовку Springfield Model 1873 на основе боеприпаса .50-90 Sharps.