Three or four shots should be sufficient. Sight it 1 and bit inches high and don’t worry about drops till well past 200.
Terrible advice, failing to test ammunition that you plan to use at ranges beyond 100m is pure negligence.
200...? Yards? feet? Inches?
I have used Federal Power Shok Copper .270 for work and the amount of drop witnessed from 100m to 200m and beyond was simply unacceptable. Not measured in inches but feet.
Blowing the front leg off a deer that you can't follow up on will likely see the day ending with 'Don't come back'.