Most of the suggestions here I've never encountered
What
normal long range shooters do is to range the target, in your case 450 yards, look at your data either taped to your rifle or on a PDA ballistic program, reach up to your elevation knob and dial it from 0 to 8.5
If there's no wind, put the crosshair on the target and squeeze the trigger.
Seems a little easier than any counting exercises.
