RE: 308 Range
No, 300 yards is not asking too much of the .308 for deer hunting (just assumed you meant for deer) to at least 300 yards, IF YOU ARE A COMPETENT SHOT AT THAT RANGE!! A .308 with 150 grain bullet will kick somewhat harder than an equal weight .25/' 06 with 120 grain ammo. But your .308 will probably be a lighter gun, causing more recoil to be felt by the shooter.