WHICH rifle? There is more than one type made in this caliber.
NO the .223 is a totaly diffrent round than the .223 WSSM
No. The .243 is a larger calibre, and the parent case is the .308 Winchester, necked down to accept the smaller projectile. It's considerably more powerful than the .223.
.223
A rifle with a 5.56x45 chamber can utilise .223 Remington cartridges. A rifle with a dedicated .223 Remington chamber cannot accommodate 5.56x45 cartridges. A rifle with a .223 Wylde chamber can accommodate .223 Wylde, .223 Remington, and 5.56x45, but neither a rifle with a 5.56x45 or a .223 Remington chamber can accommodate the .223 Wylde cartridge.
The AR 15 is a rifle, not a caliber. the .223 is a caliber. Usually the AR-15 is made in caliber .223.
308 Rifle can hit a target over 300 yards away. The military used them as sniper rifles and they r more accurate than a .223
.223 Remington can be cycled in a 5.56x45 rifle; 5.56x45 should not be cycled in a .223 Remington firearm.
no
depends on what you want to do with the rifle. .223 makes a good target load, but is rather light for hunting larger animals- in fact, not legal in several states. The .243 has more recoil (slightly) but has more range and power.
More accurate than 90 percent of the people who will shoot it.
No, .30-30s do not have a lot of kick, however, recoil (kick) being "bad" or not is largely a personal issue. For some folks, even the diminutive .223 has a lot of recoil, while others have no problem with the recoil from a .378. It also depends on the design of the rifle.