The cartridges are similar, but not identical. Differences include:
You can safely fire .223 rounds in a 5.56 rifle, but it is not advisable to fire 5.56 rounds in a dedicated .223 rifle.
5.62 is bigger
.001 inches. Makes a difference depending on what you are shooting, how old the barrel is, etc..
Caliber refers to the diameter of a bullet (bullet is the part of a cartridge that is fired out of the gun). A .223 caliber bullet is .223 inches across. It is normally used as a rifle cartridge. a .45 caliber bullet is more than twice as wide as a .223, and is usually used in pistols. The .223 is lighter- it weighs about 1/4 of a .45 bullet, and they are different shapes- .223 is usually pointed, the .45 is rounded.
The AR 15 is a rifle, not a caliber. the .223 is a caliber. Usually the AR-15 is made in caliber .223.
No But the Caliber is the same but theres more powder in the 223
.223 caliber or 5.56mm.
Yes. Significantly.
.223
no that is a 3-0-8 it is 30 caliber a 223 is 5.56 mm it is 22.3 caliber
"The .223 Remington is a sporting cartridge with almost the same external dimensions as the 5.56x45mm NATO military cartridge."In short, 223 IS the caliber- .223 inches
>.223
It looks like if it is a centerfire caliber you can use it. So, yes you can use a .223 caliber rifle.