You are correct on the hemmoraging (sp?) but the energy transfer I mentioned stuns the birds nervous system (in theory) to the point they don't fly away or not as far away. Turkeys can fly a long way in a short time and they are not particular in what they fly. Ever tried to find a dead turkey lying among brush or leaves after losing sight of it? It is not too easy. Some hunters use string trackers, myself I have never liked them as they always let me down when I did use them. Study up on turkey anatomy, whenever I dress one out I am amazed at how their lungs are protected by the rib cage. I hope I am not muddying up the water so to say.
Vern Pratt