Really depends on how long a barrel you can tolerate. If you are just plinking out to 1000yds, then this is not too critical. I would recommend the 260Rem and 7-08. From 22 to 24" pipes, they will do what you want have moderate recoil and can be made very accurately.
If you want more performance then 6.5-06 or 280 rem. For a hunting rifle, I would avoid the AI cases because they may be harder to feed from some actions.
Well I have to ask what is wrong with a 7mm rem mag? or even a 7mm wsm?
Also how much weight is too much weight? If it is only gonna be a back up rifle then why not get a little heavier to help out with the recoil (very beneficial to target practice). And if it is only in the case that your primary rifle breaks down that you have to use it then you won't be hunting with it much therefore you should be able to tough it out with a little extra weight for the short period of time that you will be carrying it.
Just a thought so take it for what it's worth to ya. [img]/ubbthreads/images/graemlins/laugh.gif[/img]
I shoot 1/4 inch groups at a 1000 yards. That is...till my second shot.