Excellent stories. However on an "apples to apples" basis ANYTHING punched through both lungs without touching bone or CNS will run around for a while. It is the nature of the shot.
If you hit bone and cause enough assorted trauma from fragmentation, things will B-F much more often. The trade off is you may or may not have fragged more meat. As with many things around the campfire the issue is where something was shot and with what bullet and NOT with the brass case and quantity of powder that pushed said bullet.
