Great info Mac!!

I think you could also scope a Double to hit at distance and accomodate bullet drop and not screw up your short range shooting with the same scope.

Once the scope is on the POI between both groups you could use the TDS system or similar Leupold Boone and Crockett system to adjust for distance when the yardage is known and regulation achieved at the various increasing distance desired.Such a scope would make your rifle more versatile in different hunting situations.

http://www.swfa.com/c-307-leupold-vx-iii-riflescopes.aspx