If you are a hunter you should have a range card for your rifle/ammo anyway. So the zero really doesn't matter as long as you practice with it.

It's all preference.

There is the range card on my SCAR-17. Laminated and tucked into the stock, one quick tug and I have ranges out to 800 yards with scope clicks and holdover....



a good site to make these is here:

JBM - Calculations