Hey Rev., I have had all 3. Out to 200 yds I dont think the killing difference on deer is worth mentioning. But as long as you HAVE mentioned it

I would go with either the 7m-08 or the 308. Bullet choice is much better whether you shoot factory or reload. Velocity is higher also, although I dont know if it is that big of a consideration; guess it depends on where and how you hunt. The only neat thing about going with the 7-30 waters is that you would only need one bullet to shoot out of both pistol and rifle. Kind of a matched set.
long