223
It depends on what you mean. Strictly speaking, a .223 cartridge has a .22 caliber bullet, but when people say .22, they are usually referring to .22 Short, Long Rifle, or Magnum cartridge, which is different than .223.
22 cubed = 223
The .22 Long Rifle is a rimfire, whereas the .223 Remington is a centerfire cartridge. The .223 uses a longer 'spitzer' projectile vs. the rounded projectile of the .22 LR. The .223 tends to be a heavier projectile, and has a much higher velocity than the .22 LR.
No But the Caliber is the same but theres more powder in the 223
"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
No.
223
It meant 22/3
Yes. The same brush you use to clean a .223 can be used for .22 LR, .22-250, .222, and other cartridges in that same calibre range.
Yes, they do shoot the same projectile although the 22-250 takes a heavier charge of the same powder over the .223.
Not the rimfires (.22 Short, .22 Long, .22 Long Rifle, .22 Magnum), but centrefire cartridges in the same calibre range (.22-250, .222 Remington, .223 Remington Magnum, .223 Remington, etc.) can be sufficient for coyote.