I'm jut a rifle (sometimes handgun) hunter, so I try to place all of my shots where the bullet penetrates right about where the brain and spine meet if possible. If I can't get a clear shot at the head, I try to hit it somewhere along a vertical line from low on the shoulder up to the spine. If I'm shooting low, I want to shoot through the leg bone, not around it. Makes the hog significantly less mobile, and the bones themselves add to the damage done by my bullet to some very vital organs and arteries.