7mm-08, For shots inside of 300 yards, they kill surprisingly well. I've heard many people who owned both the 270 Winchester and a 7mm-08 make the statement that the 7mm-08 kills just as well as the 270, only with less perceived recoil.
To answer your question as posted and with rifles you mentioned.........I've been using a 200 yard zero with my 7mm08 and 140gr accubonds. Hold over 6" at 300. Easy as pie and fast.
I use other rifles for anything beyond that.
7mm-08 First choice due to lightest recoil and excellent penetration, and I just plain like em'
308 second choice due to ammo availability and broad bullet weight availability.