When To Choose A .308 Over 5.56?

[markm]

5.56mm carbine - 300 meters to contact. Good selection of defensive loads.

5.56mm rifle - 500 meters with a decent selection of loads. 600 meters for punching paper with match ammunition.

.308 - out to 500 meters with ball ammunition. 1000 yards with match ammunition.

I stopped hunting years ago, so I can't comment on the effectiveness of using either caliber on game animals.

I agree with this. Ammo can extend the range of the given caliber. And in the case of 5.56... not only in accuracy, but in effectiveness if something like the 77gr OTM is shot.