Shank (.223 Remington) - 0.4370 / (NATO 5.56) - 0.4370 / (Difference) - 0.0000
Base Diameter (.223 Remington) - 0.3760 / (NATO 5.56) - 0.3780 / (Difference) - 0.0020
Shoulder Diameter (.223 Remington) - 0.3553 / (NATO 5.56) - 0.3560 / (Difference) - 0.0007
Neck-2 (.223 Remington) - 0.2550 / (NATO 5.56) - 0.2550 / (Difference) - 0.0000
Neck-2/Case Mouth (.223 Remington) - 0.2540 / (NATO 5.56) - 0.2550 / (Difference) - 0.0010
Freebore Diameter (.223 Remington) - 0.2245 / (NATO 5.56) - 0.2270 / (Difference) - 0.0025
Pilot Diameter (.223 Remington) - 0.2180 / (NATO 5.56) - 0.2180 / (Difference) - 0.0000
Base-to-Case Mouth (.223 Remington) - 1.7720 / (NATO 5.56) - 1.7750 / (Difference) - 0.0030
Base-to-Shoulder (.223 Remington) - 1.2340 / (NATO 5.56) - 1.2380 / (Difference) - 0.0040
Neck Length (.223 Remington) - 0.2200 / (NATO 5.56) - 0.2180 / (Difference) - -0.0020
Freebore Length (.223 Remington) - 0.0250 / (NATO 5.56) - 0.0500 / (Difference) - 0.0250
Rim/Belt Thickness (.223 Remington) - 0.2000 / (NATO 5.56) - 0.2000 / (Difference) - 0.0000
Shoulder Angle (Degrees) (.223 Remington) - 23.0 / (NATO 5.56) - 23.0 / (Difference) - 0.0
Throat Angle (Degrees) (.223 Remington) - 3.1 / (NATO 5.56) - 2.5 / (Difference) - -0.6
Not much. One is in caliber (hundredths of an inch) the other is in millimeter. So 5.56mm is equal to .223 caliber. In the civilian world, one typically would buy .223 rounds for their AR15, while in the military, one would use 5.56mm
No. You can run .223 Remington through a 5.56x45 chamber; you should not do the reverse.
No
The 5.56 NATO round is a tad longer, about 0.4mm longer; but that has nothing to do with why you shouldn't intercnahge them. You shouldn't mix them because a 5.56 NATO chamber has a longer leade (cartrige mouth to rifleing engagement), a .223 chamber has a shorter leade. Shooting .223 out of a 5.56 chamber will not lead to any problems other than less-than-stellar acuracy, however, usind 5.56 in a .223 chamber WILL lead to premature wear out of the chamber and parts.
Yes
Depends on your configuration. The most common, by far, is .223 Remington/5.56x45mm NATO.
Depends on your configuration. The most common, by far, is .223 Remington/5.56x45mm NATO.
Depends on your configuration. The most common, by far, is .223 Remington/5.56x45mm NATO.
The M-16 Carbine or M4 use a 5.56x45 Nato round or the civilian version .223 Remington
Yes. Do not fire 5.56 in a .223
no ,7.62 has more impact in the shot you can shoot a .308 in a 7.62 ,but not 7.62 in a .308
36
While the M4 Carbine is intended to fire a 5.56x45mm NATO round that is distinct from the .223 Remington, both are centerfire cartridges. So yes, the M4 Carbine is a centerfire rifle.
Of course you can. The .223 is the civilian version of the 5.56x45mm NATO ammunition. They are slightly different but the difference is constantly neglected due to the fact that it is safe to shoot. Hope this helps.