RL .243

[unkated]

The .243 was developed as a necked down .308 cartridge. So it's has quite a punch. Its bullet obver the years (since the original 1955) has become heavier (5.5 gm to 10+), balanced by slightly lower muzzle velocity.

Plugging its values (including those for a Ruger American in .243) into the T2K formula, it's seems comparable to a 5.56 NATO round.

I'd say the lighter rounds would be morelikely to wound than kill; the heavier end more likely to kill.

A simple way of looking at it is if it can bring down a medium sized deer, it will work on a man.

Uncle Ted