i need to buy a scope i have a nikon buck master 4.5x14 side focus i have two rifles that need scopes a savage 110 in 300 mag and a ar-15 223 flat top a-2 style with a 1in 9 twist the 300 will be used for hunting in western neb. and hopfully elk in montana the AR ill shoot at the range 300 yards max and praire dogs if i get the time to go icant deside what to do and what power would work best on the rifle i buy the new scope for i would like to stay between 300 to 400 hunderd on the new scope