To just do a little math . . . Assume the bow shoots 300ft/sec (not likely but its a good round conservative number) and the shot is 128yds (384 ft). At best it will take more than 1.25 seconds for the arrow to get there. I know that sounds like a really short amount of time but . . . Try walking while limiting yourself to 1 stride (approx. 1 yd) per second. Count 1001 . . . 1002 . . . etc. Careful, don't fall down, its tough to keep your balance moving that slow.
That's a pace of 3 feet per second. In 1.25 seconds at even that extremely slow pace the deer would move almost 4 feet before the arrow got there. Even if you can Robin Hood arrows at that range that's to much potential target movement between release and strike of the arrow.
As an alternative look, consider a 30-06 traveling at 2700 ft/sec. The bullet will take about 0.15 seconds to get there. At the same target pace that's still better than 5 inches the target will move from the point of aim at the time of trigger pull until bullet strike. Interestingly enough that would be equivalent to a 15yd, 300ft/sec bow shot or a more realistic 12yd, 250ft/sec bow shot at the same moving target.
On an unrelated note, this is also a good case for stopping deer before shooting. That 5 inches may be the difference between sticking one right behind the shoulder where you were aiming and poking it right in the shoulder, even if your arrow went right where it was originally intended.
That's a pace of 3 feet per second. In 1.25 seconds at even that extremely slow pace the deer would move almost 4 feet before the arrow got there. Even if you can Robin Hood arrows at that range that's to much potential target movement between release and strike of the arrow.
As an alternative look, consider a 30-06 traveling at 2700 ft/sec. The bullet will take about 0.15 seconds to get there. At the same target pace that's still better than 5 inches the target will move from the point of aim at the time of trigger pull until bullet strike. Interestingly enough that would be equivalent to a 15yd, 300ft/sec bow shot or a more realistic 12yd, 250ft/sec bow shot at the same moving target.
On an unrelated note, this is also a good case for stopping deer before shooting. That 5 inches may be the difference between sticking one right behind the shoulder where you were aiming and poking it right in the shoulder, even if your arrow went right where it was originally intended.
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