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The .45-70 (11.6x53mmR), also known as the .45-70 Government, .45-70 Springfield, and .45-2 1 ⁄ 10" Sharps, is a .45 caliber rifle cartridge originally holding 70 grains of black powder that was developed at the U.S. Army's Springfield Armory for use in the Springfield Model 1873.
The brass suppliers or cartridge manufacturers would sometimes have the brass batch or cartridge lot number to the right of their code letter. The post-war headstamp had the manufacturer code (AI / EMZ or NWM) at the 6 o'clock position. AI Artillerie Inrichtingen NV ("Artillery Factories") (1679–1983) – Zaandam-Hembrug, Netherlands ...
In the modern era, the cartridge has gained favor for metallic silhouette shooting and Black Powder Cartridge Rifle matches where it serves as a low-recoil alternative to the common 45–70. [3] [4] It was commercially available in black and smokeless varieties until around 1935, and can be handloaded by reforming .45-70 brass. [2]
New production loaded cartridges and unloaded brass cases are rare and are often created using reformed .45-70 brass. The cartridge was originally intended to outperform the similar .38-55 Winchester but in reality had very similar ballistics despite using more gunpowder. [4]
The Whisper family of firearm cartridges is a group of wildcat cartridges developed in the early 1990s by J.D. Jones at SSK Industries.The Whisper family was developed as a line of accurate, multi-purpose cartridges using relatively heavy rifle bullets for a given caliber in subsonic loads.
According to the US Army Ordnance Department tests, the 45-70-405 was loaded to 19,000 psi, [4] while the 45-70-500 was loaded to 25,000 psi [2] The average accuracy of the Springfield Model 1873 was a circle with an average radius of 1.7 inches at 100 yards, corresponding to an ~3.4 MOA.
45 Raptor : uses the standard 7.62 NATO case, cut to a length of 1.800" from 2.015", resulting in a straight-wall cartridge, neck is sized to 0.452". The resulting COAL of 2.300" is only 1.02 mm longer than the maximum COAL for chambering a cartridge in the smaller AR-15; however, the 45 Raptor chamber pressure is allowed to be as high as ...
70 60 80 — Hard 65 105 7 210 Beryllium copper (ASTM B194, B196, B197) Cu 97.75, Be 2.0, Co or Ni 0.25 Annealed, solution-treated 32 70 45 B60 Electrical, valves, pumps, oilfield tools, aerospace landing gears, robotic welding, mold making [3] Cold-rolled 104 110 5 B81 (Rockwell) Free-cutting brass Cu 62.0, Zn 35.5, Pb 2.5 Cold-drawn 44 70