Re: witch one?
I had a rem 700 30/06 re-barrelled it to 7mm rem mag. There is no way I would go back!
The 7mm mag will get it done so much easier, better velocity, better BC, way less windage.
My longest shot with the 30/06 was 475 yds, dropped the stag but it got up and I never saw it again, no blood trail nothing. Searched for hours with my dog. no-luck.
With my 7mm mag and 162 a-max or 168 berger I have taken numerous game (deer sized) from 358 yd to 638 yds and never lost an animal. I use the 160 accubond inside 300 yds, it works well.
Go with the 7mm mag and don't look back.