RE: 7mm Rem Mag vs 30-06
In my limited experience with the 7mm RemMag, it appears that the 7mm recoils quite a bit more than the old .30-06. My buddy reloads for his 7mm mag as well as for .30-06, and he complains of short 7mm mag case life. He mentioned that the belt made re-sizing the case somewhat more difficult, although I am not quite sure why this is, since I've never reloaded a belted round.
If I needed a bit more reach I would probably pick the 7mm mag over the .30-06, but mos of my hunting shots have been under 200 yards, so the old '06 works fine for me.