The 223 Remington (designated as the 223 Remington by the SAAMI and 223 Rem by the CIP) is a rimless, bottlenecked rifle cartridge. It was developed in 1957 by Remington Arms and Fairchild Industries for the U.S. Continental Army Command of the United States Army as part of a project to create a small-caliber, high-velocity firearm. The 223 Remington is considered one of the most popular cartridges and is currently used by a wide range of semi-automatic and manual-action rifles as well as handguns.
In the US Army, the cartridge is referred to as "Cartridge, 5.56 mm ball M193." The 5.56×45mm NATO was also developed from the 223 Remington.

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  1. Vaporzz

    .223 Reloaded, Insomniac!

    I couldn't sleep last night, so I blasted out 20 rounds of .223 55gr fmj bt Hodgdon h335 22.4 gr 2.202 col should get around 3000 fps according to the Hornady recipe I used from my book, will see, Lees loadmaster, inlinefabrication flush mount!
  2. N

    Compact scope for .223

    Looking to put a scope on a couple of .223 Rifles. I’m on a farm so want something small and tough. Don’t want a big foot-long scope something compact about 4x
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