Scout and find a thick spot near water. Get in early. Walk slow and quietly. Sit still and be patient. SQUEEZE NOT PULL the trigger. Make an ethical shot. Thank the almighty for your harvest.
Never worked for me. Over 200 yards and no good rest i could never hold the crosshair on for a good long squeeze or when an animal is busting it across rough country or through timber.
In those cases, when the sight hits hair you better hit that trigger.
With a bow and arrow at 30 yards or with a gun on a running animal at 200 yards you best shoot towards where its fixing to be. About 8 feet in either case.