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45-70 Research Paper

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45-70 The .45-70 delivers extraordinary power at close range, but is difficult to shoot accurately at longer ranges because it’s big and slow-moving bullets have a steep trajectory. While the .45-70 is relatively popular among black-powder silhouette shooters and among those who hunt big game in heavy cover, only a relatively small percentage of hunters utilize it. With a muzzle energy of about 1,600 foot pounds, this cartridge is one of the most powerful loads. The original black powder load pushed a cast lead bullet at a velocity of about 1,350 feet per second. A modern 300 grain load will fire at 2,280 foot pounds of energy at the muzzle. A 325 grain bullet has a muzzle velocity of 2,050 feet per second and a muzzle energy of 3,032 foot pounds. The hottest load ( Buffalo Bore 405 grain jacketed flat point) will fire at 2,000 feet per second and very large muzzle energy of 3,597 foot pounds. A drawback though is that is is only accurate out to about 200 yards and will drop almost 50 in. at 350 yards. 7mm08 …show more content…

The parent case is the .308 Winchester with a narrowed neck that fits a .284 inch bullet on a .315 inch neck with a rimless, bottleneck case. It has a length of 2.035 inches and is 2.80 inches overall. The average FPS is around 2,827 and the average energy is 2,448. A 120 grain cartridge with 39.5 grains of powder will fire at 2,500 feet per second and 3,000 with 49.7

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