This is a typical ranging /trajectory chart supplied by IOR for their scopes.
The only time I use it is at the range on set distance steel from 200 too 1,000.
When hunting I disregard it simply a set of rangefinder binoculars is faster and better, as was stated, you will be looking through them first anyway, then I turret to the distance I need and hold center if using a scope be it FFP or SFP.
I keep a dope chart taped to the stock, I find this way the easiest for me when using a long range rig, be it hunting or at the range.
