223 Remington Rifles
Among many rifle calibers, there is only a handful of those that can boast serving as prototypes for others. .223 Remington Rifles are among those few. Initially created as part of a project to create a small-caliber and high-velocity firearm, .223 Remington turned into one of the most widely-used firearm cartridges. Some may say its popularity is overshadowed by its close relative, 5.56x45mm, but Remington .223 semi-automatic rifles remain a common choice for many American shooters.
The story of Remington .223 rifles began in 1957 when the U.S. Continental Army Command launched a project to create a small-caliber, high-velocity firearm together with an innovative cartridge. Several gun-making brands got the offer to join the development, including Fairchild Industries, Remington Arms, and Winchester Firearms. The initial cartridge that was developed by Remington during the project bore the name .222 Special. But since several .222 cartridges were in development, participants needed to differentiate them. Thus, .222 Special became .223 Remington. The cartridge was tested together with an ArmaLite-produced AR-15 - both prototypes showed exemplary results. After rigorous tests that lasted for about three years, ArmaLite AR-15, chambered in .223 Remington, was recommended for adoption. It would later receive the name M16 and become the standard U. S. military rifle.
.223 Remington served as a base for a NATO standard 5.56x45mm caliber, which means they should be similar in one way or another. And while externally they are almost indistinguishable, it would be a grievous mistake to use them as interchangeable. Since 5.56 has higher pressure levels than .223 Remington, its chamber walls are made thicker to withstand the pressure. .223 Remington Rifles cannot withstand the pressure produced during the 5.56 cartridge shot and will very likely become severely damaged and may harm the shooter. However, using .223 cartridges for 5.56 rifles is relatively safe, even though you’ll most likely experience a decline in accuracy.