I also agree with whoever said that shooting from a rest is different. When leaning over a shooting bench , your body doesn' t have much " give" to it. So the more " upright" your torso is, the more your body will flex with the recoil.
I have to agree with this also, I had a .270 bruise me up pretty good last year due to the bench being built so that the shooter was bent over forward too much. I had shot that .270 for a couple years then as soon as I started shooting at this new range I was feeling the recoil.