By the time you have tanged your moving target and twiddled your turrets the deer has already died from old age.
I know how far distances are on land I stalk. I have spent a bit of time learning the distances.
Thus when I see a deer I just concentrate on shooting it.
And with a reticle if you know the length of your typical deer and sub tensions in your scope it really is a quick method of confirming range.
But then I did learn my stalking before all these money extracting devices came along.
It was very simple - get into a group of hinds. Look out the cull animals and shoot them. Ffs we did it with 6x42 abd 10x42 fixed power scopes and no moderators and wooden stocks. On the one estate I stalked a lot we were shooting 300 plus hinds a year, taking 15 to 20 a day at times.