What exactly is 'ballistic balance'? Start with what you want a bullet to accomplish and the range you need the bullet to do that. If being able to hit and kill at 700 yards is the end point, 'balance' is completely different than in the same scenario at 300 yards. The former 210 grains, the latter 165, would be the 'balance' point for me. It must be a given that the rifle shoots both well enough.
It all starts with hitting; followed by 'what' and 'where'. Fortunately the .30 cal is wealthy in that regard.
