What are your opinions on powers. 6-24 or 4-16. I am looking to purchase two scopes. Both will be on rifles that are capable of long range, but living in Indiana I don't want to over power the scopes. The rifles they will be going on, 1 Remington 700 in .270 Win. the other, is AR-15 6.5 Grendel with a 24" bull barrel. I am really thinking about the Vortex Viper PST.