Remington556x45mm

Remington556x45mm is Remington’s designation for ammunition in the 5.56x45mm NATO cartridge family. It is a rifle cartridge used in military, law enforcement, and civilian sporting rifles, and is commonly associated with AR-15 style firearms. Remington produces multiple loads within this caliber, including full metal jacket training rounds as well as higher-performance hunting and tactical options.

Technical characteristics commonly associated with 5.56x45mm NATO ammunition include a .224 inch diameter bullet and a case length of about 1.76 inches, with an overall cartridge length near 2.26 inches. Bullet weights typically range from roughly 36 to 77 grains, with 55- to 62-grain full metal jacket configurations being the most common for general purpose use.

Performance figures vary by load and barrel, but standard 55- to 62-grain loads often achieve muzzle velocities in the neighborhood of 2,900 to 3,100 feet per second, producing roughly 1,200 to 1,350 foot-pounds of energy at the muzzle. Remington’s 5.56 loads are designed for rifles chambered for 5.56x45mm NATO and are widely used for target shooting, training, and various hunting applications.

Safety and compatibility: 5.56x45mm NATO ammunition is intended for firearms chambered for 5.56 NATO. Firing 5.56 ammunition in a firearm only chambered for .223 Remington can be unsafe in some cases due to higher chamber pressures; always follow the firearm’s markings and manufacturer recommendations. Most rifles marked 5.56/.223 or 5.56 NATO are designed to fire both, but verification is essential.

See also: .223 Remington, 5.56x45mm NATO, Remington ammunition, AR-15.