You should both know where the animal was hit at the distances you say you're shooting and certainly care about where it was hit since it ran off and you didn't find it!
Maybe you can come up with a formula to calculate where the bullet hit the hog. i don't have the time. This morning i'm taking a Ruger 10/.22 to that lease and killing some small pigs before they become hogs and totally trash the deer hunting on that place.
Pertinent information:
1. Hog was walking at a fast clip.
2. Distance was about 65 yards.
3. i put the corsshairs about one foot in front of the hogs nose.
The vaunted "shields" are not cartilage. They are more like thick somewhat harder fat that usually come off with the skin. Coyotes here eat the "shields". In any event a 150 pound hog does not have much in the way of "shields".