I zero at 4x @ 100 yards. The setting I use @ 100 yards for hunting deer.K-43, I'm not sure I follow your line of thinking above. Usually, if someone zero's at 100 yards on max magnification, then as they drop down in magnification the distance each BDC circle represents increases. What you describe above is just the opposite of what should happen unless I have made an error which the way today is going wouldn't be unusual.
Below is an example of data you can pull up utilizing Spot On.
(Edit: Most of my deer shooting has been at about 100 yards give or take 25.)
@ 8x, 1st dot is on at 206 yards and 2nd dot is on at 302 yards.
I don't zero at max power because I use 4x @ 100 yards plus or minus, and crank up beyond 150 yards.
150 grain bullet
BC .336
MV 2800
Edit:
The beauty of the app is that you can adjust according to how you wish to approach it. I start with my accurate handload data. Then adjust to how I use the scope.
When hunting I want to keep it simple, no cards, no calculations, just two power settings on the scope to change. If in a stand, I lase the ranges of key landmarks so that when a deer appears, I know an approximate range.
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