Gene, It is not the same as a deer. If it is a straight on shot,send it right down the middle at the base of the neck. It will be easy to see if it is straight on,The pig will have it's head in the air trying to smell you. From the side stick it in just above the elbow and tight in the arm pit. It is high. Either way get on it quick and make it run ,and not lay down. Unlike a deer. The fat closes the hole and you will lose the blood trail pretty quick if you don't have a heart or double lung shot. Any less then those two shots you better keep after them and keep sticking them till they fall. That's my opinion based on hunting them in thick stuff.