概要 翻訳

The ․45-70 Government （formally the ․45-70-405） is a highly potent‚ large-bore rifle cartridge developed by the U․S․ Army at Springfield Armory in 1873․ The name denotes its ․45-inch caliber‚ 70-grain black powder charge‚ and 405-grain bullet weight․ Originally used in ＂Trapdoor Springfield＂ rifles‚ it remains deeply popular for big game hunting․ Key Details ＆ Modern Context History˸ The cartridge was designed to replace the ․50-70 for the military‚ offering superior long-range ballistics and stopping power․ Modern Hunting˸ It is renowned for taking down tough North American big game like bison‚ elk‚ and bear․ Firearms˸ While originally a single-shot military round‚ it is incredibly popular in modern lever-action rifles‚ such as the Henry Side Gate 45-70 and the Smith ＆ Wesson Model 1854․ Ballistics ＆ Recoil˸ The heavy‚ slow-moving projectiles drop significantly at longer distances but deliver devastating kinetic energy up close‚ often exceeding modern cartridges like the ․30-06․ Regulations˸ Because it is a straight-wall cartridge‚ many hunters utilize it in states that restrict bottlenecked cartridges․ However‚ some locales mandate strict case-length limits‚ making it illegal in certain states （e․g․‚ Michigan and Illinois）․

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