I am taking it for granted that the wound I believe I see is the entry wound which is high on the shoulder. Where should that shot been placed? It looks like a good lung shot to me. But then I do not know hog anatomy.
That is the entry wound. The bullet did not exit. That shot is high for a good lung shot: He had bled some out the snout but not much. That high shot is most likely the reason he ran about 100 yards after being hit. A hogs heart and lungs sit low in the body, much lower than a deer. Chalk that shot up to hog fever.
Got a call from my friend. That hog is 19" through the shoulders.