I have a Leupold Ultralight 3-9 on my M70. Not a bad scope and light weight and adequate for local shooting hours which are 1/2 before sunrise to 1/2 hour after sunset. IMHO 3-9 matches up to a 270 fairly well although a 3.5-10 or 2-7 would work fine. I'm sure someone will come along and say you are crazy if you don't go fixed 6.
I agree, I was thinking a 3-9 or 3.5-10 would prolly be close to optimal. I do not discount those who like straight 6's, either of the Leupold or super chicken persuasion, and might try a straight 6 on one of my guns at some point. I kinda have my eye on SWFA for Black Friday for a scope for a different rifle, but with the 270 I'm thinking I'll prolly go with a variable in the 3-9 range.