High hunt shooting?

[Skillet]

I have the same caliber but shoot 140 accubonds.   If you're truly hunting at 5000-7000 feet, you will need to worry far more about how the steep angle of your shots reduces your drop than atmospheric density.  Not many flat 100 yard ranges up there...

[grizzlyadams]

Ok sorry about that. I misunderstood what he was saying. Sounded like he was telling the OP that there would only be a 1-2" drop In his round out to 600 yards.

[HawkCreek]

The Hill People Gear rifle card is handy for this type of thing. While not meant for precision work it is quite suited for hunting scenarios.