<P> A . 223 Wylde chamber is used on . 223 caliber rifle barrels to allow them to safely fire either . 223 Remington or 5.56 x45mm NATO ammunition . </P> <P> In 1957 during research into development of a military . 22 caliber rifle the Remington . 222 Special was created . Due to there being several . 222 caliber cartridges under development, the . 222 Special was renamed to . 223 Remington . The cartridge became the standard for the US Army in 1962 as the M193 Cartridge . </P>

What's the difference between 223 and 223 wylde
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