castman, even when you compare the 30-06 with a premium bullet it doesnt have the advantage over the .243. Out of 4 comparos the 30-06 only takes one. At 500 yds the .243 has better wind drift, has more velocity and has less bullet drop. the 30-06 has more energy, and energy is not what kills animals. there is no such thing as knockdown power.

What will mushroom better a 165 gr bullet going 1900 fps or a 100 gr bullet going 2000 fps. Theres more to just ballistics. The .243 will have better devestation on internals.
The .243 has a lot of umph. I've proven it twice. next question please. LOL