![]() ![]() military adopted the M193 Ball cartridge that was essentially the same cartridge as the. 223 Remington (right) shares identical outside dimensions as the 5.56 NATO (left) but is not fully interchangeable.In February 1964, the U.S. Traditionally, it propels a 55-grain bullet at 3,240 fps – a notable increase in velocity and effective range when compared to the. 223 Remington to prevent confusion, but it was not introduced commercially until December 1963 in the Remington Model 760 pump-action rifle and was soon chambered in other rifles. 224 Springfield) that had a shorter case, shorter neck and shorter overall cartridge length than the. 222 Remington Magnum in 1957-1958.Īdditional experimental cartridges were designed to function in the AR-15 and meet military requirements, including the. For several reasons, this cartridge was not accepted by the military, but Remington chose to introduce it commercially as the. 222 Remington case was lengthened, its shoulder moved forward and its neck shortened to create a new experimental cartridge that would offer greater performance and properly function in the gas-operated action. In 1957, the Armalite AR-15 rifle was in development, and the. It was the “go-to” benchrest cartridge for decades, and even produced a near-perfect five-shot group officially measured at. It offered long barrel life, low recoil and accuracy, all of which helped it establish a remarkable record of benchrest wins. It pushed a 50-grain bullet at a claimed 3,230 fps (reduced to 3,140 fps today) and quickly became popular with varmint and predator hunters. It was based on a new rimless case and filled an obvious void between the. 222 Remington in the company’s Model 722 bolt-action rifle. 223 Remington really began in 1950, when Remington introduced the. 222 Remington Magnum (center) introduced in 1957.The history of the. ![]()
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