I live in west virginia and i hunt different places, where i can shoot up to 100 yards which isnt that far. And other places where i can shoot up 800 yards which i would like to do. i have a browning 7mm-08 a-bolt with a konus 3-12x50 scope. i shoot a federal nosler ballistic tip. what would i need to get to be able to shoot that far awa and kill an animal? all tips would be helpful.