I'm going to guess that the standard .270 and .30-06 load both have about the same amount of powder in the casing. Recoil is a function of a.) the amount of powder, b.) the weight of the bullet, c.) the weight of the gun, and d.) the shape of the stock. If you are shooting twin Remington 700's (or Winny 70's, Ruger 77's, etc. for that matter) in .270 and .30-06, and use 150 grain ammo of the same brand in each, recoil is going to be almost exactly the same. I think some of y'all that are noticing a difference in recoil are shooting rifles that have different weights and stock designs, combined with different ammo loads.