223 / 5.56mm Ammo

The .223 Rem / 5.56 NATO round is by far the most common rifle cartridge used by civilians in the USA. 223 Rem and 5.56 NATO are the most common chamberings used in the Americas most popular rifle, the AR15. The .223 Remington and 5.56×45mm NATO cartridges and chamberings are similar but not identical. While the cartridges are identical other than powder load, the chamber leade, i.e. distance from the projectile while seated in the case to the rifling is typically shorter in .223 Remington commercial chambers. Because of this, a cartridge loaded to generate 5.56×45mm NATO pressures in a 5.56×45mm NATO chamber may develop pressures that exceed SAAMI limits when fired from a short-leade .223 Remington chamber. At SGAmmo we sell both calibers in the same catalog category because 223 ammo is safe to use in 5.56 chambers, however we recommend to use the appropriate ammo that is marked as the same caliber as the rifle markings. 223 Rem and 5.56 NATO calibers are used in AR15, Mini-14, and AK47 rifles as well as many other rifles. There are numerous companies that produce 223 and 5.56x45 ammunition, just a few are PMC, Armscor, Lake City / Federal, Remington, Hornady, Sellier & Bellot, Magtech, Tula, Wolf, Prvi Partizan, and Winchester. Bullet weights can commonly range from 40 to 77 grains which are available in FMJ , Hollow Point, Soft Point and Plastic tip. SGAmmo.com | Bulk 5.56mm Ammo For Sale | Buy 223 Rem NATO ammo Online | AR-15 Ammunition for Sale Online