I saw this idea on Pinterest.
They gave credit to longrangeshooter.com but I could not find it there to provide a direct link.
A little ballistic chart on the inside of your rear scope cover could be damn handy.I don't vary my ammo much. I also am really bad at estimating distance.
I usually sight my rifles in at 100 yards at two inches high.
--I got a deer once at 454 yards.