Here is what I am thinking:
chuck's chart lists a 308 shooting 150 grain bullets. weight is 7.5lbs recoil is 15.8 ft lbs and 11.7 fps
and the 7-08 shooting 140 grains weight is 8 lbs recoil is 12.6 ft lbs and 10.1 fps
these are not a perfect match, obviously.
Roughly correcting the 7-08 to the 308 conditions, for the 0.5 lb weight difference using an online calculator, I get about 1.2 ft lbs. increase
add 10 gr to the bullet weight will add another ft lb or so.
let's estimate the total correction is 2 ft lbs,
now at 7.5 lbs the 7-08 with 150 grain bullets recoil is 12.6 + 2 = 14.6 ft lbs.
So, the corrected numbers are 14.6 (7-08) vs 15.8 (308). My point was, not a huge difference between them recoil wise, i.e. less than 10%.
Of course, one could go nuts and put in loads and all that to see the exact number. I'm just putting it out there.
LarryG, you may want to have a look at this. It's a great reference chart
http://www.chuckhawks.com/recoil_table.htm