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In 1936, Winchester introduced the Model 70 bolt-action rifle to the American market. The Model 70 was largely based on the Model 54, and is today still highly regarded by shooters and is often called "The Rifleman's Rifle". In 1999, Shooting Times magazine named the Model 70 the "Bolt-action Rifle of the Century". [5]
The .45-70 Hotchkiss was acquired in limited numbers by the US Navy as the M1879, and (in a slightly modified version) by the US Army and several state militias as the M1883, making it the first center-fire bolt-action repeater to be adopted by any major military (the distinction of first bolt-action repeating rifle to be issued in great ...
Split washer or spring lock washer A ring split at one point and bent into a helical shape. This causes the washer to exert a spring force between the fastener's head and the substrate, which maintains the washer hard against the substrate and the bolt thread hard against the nut or substrate thread, creating more friction and resistance to ...
The predecessor to the .45-70 was the .50-70-450 cartridge, adopted in 1866 and used until 1873 in a variety of rifles, many of them were percussion rifled muskets converted to trapdoor action breechloaders. The conversion consisted of milling out the rear of the barrel for the trapdoor breechblock, and placing a .50 caliber "liner" barrel ...
Over 50,000 Model 1868 rifles were manufactured, chambered for the .50-70 450 cartridge. This model served as the basis for the definitive Springfield Model 1873 series of rifles in .45-70-405 caliber, which was adopted in 1873 as the standard military longarm of the United States armed forces for the next 20 years.
It first appeared in 1879, manufactured by the Sharps Rifle Manufacturing Company.Eventually Remington took over production and produced copies in .45-70.Arguably this was the most modern rifle in the world, until the introduction of the 8mm Lebel M1886 rifle using smokeless powder, the Remington-Lee rifle utilized the first successful detachable box magazine, unlike the Lebel rifle which was ...
This secondary spring rate dominates the spring rate of the bolt. Therefore a split lock washer can allow the bolted joint to take the same amplitude of vibration while maintaining more preload, which will result in a joint more resistant to loosening. I know that ASME B18.2.1 2009 does require the lock washer to be trapezoidal in shape.
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.