RE: 7mm08 or 270
Hi stew,
If you already have a .270 then the 7mm/08 won't give you any advantage EXCEPT for the recoil. It will be slightly less with the 7mm/08, and if you're itchin to buy a new gun a 7mm/08 is a great round.
But I agree with a few of the others that getting a 7mm/08 is duplicating, in large part, what you already have. I also like the idea of a 7 x 57 since you will find it easier to obtain. But same difference here also.
What about a .308?