Guess I don't know why anybody would want to mess with a tack driver....changes that would end up costing several 100 dollars or more, might screw up the rifle, would certainly decrease Fps and increase muzzle blast and kill the rifles value as a "stock" 700. Can anyone "splain" that to me?

What lives in AR that a 7mm08 or 308 won't hammer down?
The Marlin XS (cheap) or the Kimber 84 (expensive) are both available in those calibers and quite light.

That way you'll still have the big 7 for when you come to hunt Elk out our way. (We ride horses, so rifle weight is a non event).

3" at 300 with blue box ammo? I'd be down kissing that rifle's butt(plate)!

Think long and hard before messing with a winner.