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5.56mm NATO M855 5.56mm (5.56 × 45 mm) Ammunition 5.56×45mm 12.31 g (190 gr) 4.02 g (62 gr) 922 m/s (3,025 ft/s) 1,709 J: 7.62mm NATO: M80 7.62mm (7.62 × 51 mm) Ammunition 7.62×51mm 25.40 g (392 gr) 9.33 g (144 gr) 838 m/s (2,749 ft/s) 3,275 J
- 1980–present
- Belgium
A .223 Remington and 5.56×45 are not the same. The 5.56 has a longer leade, a longer distance between the bullet start and the onset of the rifling. Here's why it matters.
Jul 20, 2022 · The main differences are that 5.56×45 mm NATO operates at a higher chamber pressure (about 60,000 PSI versus 55,000 PSI on the .223 Rem.) and the 5.56’s chamber is slightly larger than that of the .223 Rem. Also, the throat or leade is longer in the 5.56×45 mm chamber.
The table below gives a list of firearms that can fire the 5.56×45mm NATO cartridge, first developed and used in the late 1970s for the M16 rifle, which to date, is the most widely produced weapon in this caliber.
NameTypeCountryImage1984–presentBullpup assault rifle1985–presentBullpup assault rifle2015–present1989–presentThe 5.56x45mm ammunition is divided into two categories. These are the M193 pattern and NATO pattern ammunition. The older M193 bullets are lighter, have a higher muzzle velocity and require a 1 in 12 inch rifling. The NATO ammunition uses heavier bullets that require a 1 in 7 inch rifling.
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Mar 4, 2013 · The main differences are that 5.56x45 mm NATO operates at a higher chamber pressure (about 60,000 p.s.i. versus 55,000 p.s.i. on the .223 Rem.) and the 5.56’s chamber is slightly larger...
Nov 28, 2014 · NATO agreed in 1977 to accept the 5.56×45 round as a NATO standard, with some minor variations in loading and bullet design. The acceptance of the M16 and its 5.56×45 cartridge was not without controversy. Initially, the rifle was criticized frequently after its introduction to the battlefield in RVN.
![NATO Ammo Explained [2023]](https://images.search.yahoo.com/search/images?p=5.56%C3%9745mm+nato+bullet&ei=UTF-8&_tsrc=apple&age=1m&th=113.6&tw=159.3&imgurl=https%3A%2F%2Fwww.minutemanreview.com%2Fwp-content%2Fuploads%2F2021%2F05%2FMilitary_Cartridges-scaled.jpg&rurl=http%3A%2F%2Fwww.minutemanreview.com%2Fnato-ammo-explained%2F&size=66KB&name=NATO+Ammo+Explained+%5B2023%5D&oid=4&h=924&w=1295&turl=https%3A%2F%2Ftse1.mm.bing.net%2Fth%3Fid%3DOIP.1GWbJLgxd-WG_ovEsZCI1QHaFS%26pid%3DApi%26rs%3D1%26c%3D1%26qlt%3D95%26w%3D159%26h%3D113&tt=NATO+Ammo+Explained+%5B2023%5D&sigr=x7McRKvA80xd&sigit=3Ki_zFmmV3sZ&sigi=B9ZQXqY0Xg04&sign=hF183IAlnRaI&sigt=hF183IAlnRaI "NATO Ammo Explained [2023]")
