Even if we were to accept your premise that QL is inerrant, which I reject. Your argument is that modern powders have made the 308 equivalent to previous 06 loads, and hence is equal.
One could use the same logic to assert that the 30/06 is equivalent to the 300 H&H, since current 30/06 loads equal the originally introduced loads in the H&H.
And that argument would be more or less correct, although the gap between best possibly .30-06 and book .300 H&H is bigger than the difference between best possible .308 and .30-06. A modern .30-06 AI would be required to really be the twin of the .300 H&H. But the same basic logic applies. It's the same bullet at the same velocity. There's no way for the animal to know the difference - they can't feel nostalgia. Anything the .300 H&H was used for historically, a .30-06 AI could be used for now.
