(a022) .223 Remington “FACTORY PROOF” by Remington, Light Purple Dyed “R·P 223 REM” H/S, and Dyed Bullet, Nickel Plated Brass Case, 55 gr. FMJ, One Cartridge not a Box. *WARNING*

Description

*WARNING*: Proof cartridges are “High Pressure” do not fire in your firearm, or you may be injured or killed! This is sold as a collectible only!

One Cartridge, not a box, the picture of the box is for reference only.

One Cartridge, not a box: .223 Remington, “Factory PROOF”  by Remington Arm Company, using Remington brass cases with dark brown powder-coat finish with “R·P 223 REM” H/S, , 55 gr. FMJ, Head-Stamp and loaded with a 55 grain FMJ (Full Metal Jacket) projectile.

For more versions of this caliber cartridge, please click here: LINK!

History of proof Cartridges:
Proofs are used to verify or “proof” the mechanical strength of a firearm before it leaves the factory, higher pressure then regular ammunition and should never be fire in your firearm!
The bright dark reddish wash or dye on the base (head stamp) and projectile with nickel case is the U.S. industry standard of identifying these types of cartridges.
Proofs are not normally available to the public, and should NEVER be fired out of you firearms

History of the .223 Remington and *5.56 NATO* cartridge:
The .223 Remington was introduced in 1957 as an experimental cartridge for the M4 (AR-15) rifle, as the United States forces was looking to replace the 7.62x51mm NATO* (308 Winchester) with a lighter recoil cartridge with less range for closer combat situations.
In 1964 it was adopted by the United Stated Army as the 5.6x45mm Ball cartridge: M193.Shortly after the United States Army adopted the cartridge, Remington introduced the 223 Remington to the general public for the sporting and hunting industry.
In 1977, NATO* countries signed an agreement to select the *5.56x45mm (5.6 NATO) cartridge to replace the 7.62x51mm or7.62 NATO* cartridge; however, due to the devastating wound damage of the 55 grain M193, it was decided to use the Belgian 62 grain SS109 projectile, which was soon standardized as the official NATO* cartridge.
The .223 Remington and 5.56x45mm NATO* are not actually identical, although, the outside case dimensions are approximately the same, the 5.56x45mm (5.56 NATO) has a thicker walled case and is usually loaded to higher pressures.
Because of the higher 5.56x45mm (5.56 NATO) pressures, it is best not to use the 5.56x45mm (5.56 NATO) cartridge in a rifle chambered for the lower pressure .223 Remington.
*NATO is an acronym for the North Atlantic Treaty Organization, an alliance of app. 30 countries, started after World War II, which includes the United States, most European Union countries, Canada, and Turkey.
* 5.56 in the 5.56 NATO refers to the diameter of the projectile 5.6mm or 22 caliber (.224″)
*45mm in 5.6x45mm refer to the case length (1.75″).