The arrow goes in down the center of V if the animal comes out at an angle u will need to use a range finder. I have played with 3D targets 1/4...
Also with each package you get 25FPS adjustment which covers most. My original order I just downloaded the image of inserts and matched to pin....
I tried one on my bow very simple. Went and crono my hunting setup and recieved the inserts cover speed set up at as well as above and below....
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