I like to have this option called often side focus.
Normally my scope is set so I am 3" high at 100 y and parallax is set at 100.
I am good to 300 y without any adjustment.
When shooting WT doe at 500 y I had time to use rangefinder, set magnification to 18, set Ballistic Turret to 500 y, fine tune side focus - parallax adjustment and harvested her with one shot. Prone of the bipod.
But this feature almost got me in big trouble when after shooting white wolf at 320m in the neck big Black Bear tried to take it at 10 y.... my scope was cranked at max 14 power and Adjustable Objective was set to 300 so it took what seemed like forever to crank power down and Adjust Objective to focus at this distance.
I was by the wolf and arrow points to bear.