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45-70 Gvt
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." Due to excellent the reputation it earned while in use with the Army, the .45-70 quickly became popular among sportsmen in the United States. In response to significant demand for good rifles chambered in the cartridge, the major manufacturers began building rifles specifically for the .45-70.
- Rifling twist: 1-20"
- Bullet diameter: .458 in (11.6 mm)
- Case length: 2.105 in (53.5 mm)
- Rim diameter: .608 in (15.4 mm)
- Base diameter: .505 in (12.8 mm)
- Neck diameter: .480 in (12.2 mm)
- Overall length: 2.550 in (64.8 mm)