Kel Tec SU16
You would have to define what accurate means to you- but in general, Ruger makes good, accurate firearms.
1000m
The M16 is an assault rifle that is a .223 caliber / 5.56 mm. like any weapon it is only as accurate as its shooter, <><><> It can be very accurate.
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
More accurate than 90 percent of the people who will shoot it.
25 meters
A 223 would be fine for a deer rifle but you need to make sure the (youth) person can hit the kill zone. I would suggest the 243.
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.
.223 Remington can be cycled in a 5.56x45 rifle; 5.56x45 should not be cycled in a .223 Remington firearm.
no
NO the .223 is a totaly diffrent round than the .223 WSSM
The 223 is considered a Short Action rifle.