recoil:
.270 130gr@3140 16.5lbs recoil
7mm 140gr@3100 19.2lbs recoil
15% difference and you aren't even using the heavier bullets (160gr) that optimize the 7mm.
Trust me, in physics, you don't get something for nothing.
Remington 700 is a good starting point for a custom rifle.....You can bet those actions have seen alot of work before they get to the customer.
For the money, there are better out-of-the-box rifles.