Yeah, it would be marginal with a 1-10 at that altitude, especially in a .250 Savage or .257 Roberts.
The lowest elevation I normally hunt in an average year in Montana is around 3000 feet above sea level in the eastern part of the state. Here in the southwestern part the lowest elevation is around 4000 feet, and a lot of hunting takes place at 6000-8000. The 115 BT (and Berger VLD) stabilize fine even from a Roberts, and a little better from a .25-06 or .257 Weatherby.
