I have both the 7mm Rem Mag and the 280AI. For a non re-loader I would say buy the Rem mag if you are set on either of those calibers. the 7mm will give you better factory ammo selection and slightly (not much) cheaper. If you have a 308 Win I would look to stay with that caliber. The ammo once was plentiful and about the cheapest center fire large game ammo that could be had. A few years ago I could buy the Federal Gold Medal Match ammo for $14.00 a box of 20. Pretty hard to beat that price when it comes to Match ammo. It will take Elk out to 400yds and Deer slightly further.
Every rifle manufacturer will have several models chambered for it so you can spend as little or as much as you want.
Every rifle manufacturer will have several models chambered for it so you can spend as little or as much as you want.