I must admit that your post started out pretty good,however I do have to question your range limitations on the 7mm-08 and the 270win.To post that the effective range of the 270win is 200 yards farther than that of the 7mm-08 is laughable.It doesn't matter whether you compare energy levels or trajectory,200 yards is completely ridiculous.
Then you made the statements below.
Any bullet that retains 75% of its weight after striking solid bone is adequate. Nosler partitions got it right the first time.
As someone that has taken many animals with the partition and recovered many bullets,I can tell you that the partition is not a bullet that normallyretains 75% of it's weight.On average,the weight retained is from 60% to 70%.I have weighed enough recovered partitionsto see that for myself.