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M855 5.56 ammo is a 62g bullet that has a steel core. The M855 also packs a steel penetrator tip at the end that helps it to get through obstacles easily. Though the M855 seems like a "better" choice for you to buy because of the penetrator tip, your shooting needs will determine what is best for you.Is 5 56x45 the same as 223?
The answer is yes and no. There ARE differences between the .223 Remington as shot in civilian rifles and the 5.56x45 in military use. While the external cartridge dimensions are essentially the same, the .223 Remington is built to SAAMI specs, rated to 50,000 CUP max pressure, and normally has a shorter throat.What is a NATO cartridge?
NATO cartridges. A world standard that ensures safe and reliable operation of rifles and machine guns. The new military cartridge in 7.62x51mm caliber was designed and developed by FN Herstal. It was adopted as NATO standard in 1957 and is still widely used today. Ammunition types.