First off...GREAT QUESTION!
To elaborate on what Hoss said, sight your bow in while standing on the ground at KNOWN distances and using EXACTLY the same equipment as you will use while hunting. (if your broadheads fly EXACTLY like your field points, use the field points. If not, use realy broadheads.
If noone is there to help, set multiple targets around the tree at varying distances inside 25 yards (or to whatever your top pin is set). Or have a person around to pull arrows and move targets. This is not an exercise that you need to repeat all that often before hunting season so you can call in a favor. But it is VERY important to do this ANY time you change ANY part of your bow, arrow, or broadhead combination.
With multiple target options in place, climb a tree to the height of your average hunt. For me, this often exceeds 20 feet high. If you are hunting hilly terrain but practicing on flat ground, your actual shot simulation angle may be quite closer.
Then. draw back your arrow, pick a spot, and see where you hit on practice shots.
For me, I set my bow to shoot 2 inches low at 25 yards. THis is dead on at 12-20 yards in a stand.
And I agree with SCN, but it depends on where I am hunting. For some weird reason I have yet to figure, deer don't drop much at the sound of the arrow up North. But here in the South, I have video of them being below the arrow after release. COMPLETELY out of the path of the arrow.
By FAR, AEDC is the worst. I usually aim at or below the bottom 2 inches of those tag bandits.
And for some reason, really BIG, MATURE bucks don't drop much either.
Anyway, it is FAR better to find out now, than miss an opportunity later.
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