223 Ammo: The Forgotten Caliber History of 223 Ammo Explained
.223 Remington, 55gr FMJ, Remington UMC (L223R3) Velocity Test
CZ 527 .223 Remington Varmint Laminate Review
The .223 Remington is a rifle cartridge. It started as the .222 Special and was renamed .223 Remington. It is commercially loaded with 0.224 inch diameter jacketed bullets, with weights ranging from 40 to 85 grains, with the most common loading by far being 55 grains. Ninety and ninety-five grain Sierra Matchking bullets are available for reloaders. The .223 Rem was first offered to the civilian sporting market in December 1963 in the Remington 760 rifle. In 1964 the .223 Rem cartridge was adopted for use in the Colt M16 rifle which became an alternate standard rifle of the U.S. Army. The military version of the cartridge uses a 55 gr full metal jacket boat tail design and was designated M193. In 1980 NATO modified the .223 Remington into a new design which is designated 5.56×45mm NATO type SS109.
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