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vortex optics also have a validation section that adjusts the speed in your calcs to match your physical drop.
they have a great series of three video explaining all this that i recommend to people...

i have just been on their website and they explain it well .but just got to do the maths or is what you have done the solution gimp

I just went and tested a scope today for elevation adjustment calibration but straining the brain to put the results into shooter.
The results were with 20 m0a adjusted it only lifted the shots...