Well, I'm hoping you mean humane kill . . . you had me going there for a minute.
Short answer on 30-06: 1 to 1.5" point of impact above sight @ 50 yards will give you humane kills out to 200, if you do your part and get it in the boiler room.
There's a few variables here, if you're looking for ballpark, I'd just check a ballistics table, one at link below and what they list for a 180 gr '06:
Remington Ballistics
Cartridge Type .......................50 .. 100 ... 150 ... 200
Premier® A-Frame 180 ............0.0 . zero .. -1.3 .. -4.2
But, it's always a good idea to do some shooting at 100 yards also, as well as practice from different shooting positions to improve ability, competence, and confidence!! Waidmannsheil, Dom.