Pictures will follow.
Just returned from a two week hunt. 4th day one of the party heard a cow calling. We got up and went out to the edge of the brush around our camp. There was a cow and calf crossing the river, so he sat down and waited. Five minutes later a bull came out into the open. Small bull, but at least a bull. The bull stopped and stood broadside on a gravel bar 80 yards away. I'm saying center of shoulder shot to drop him on the gravel bar. Shooter said "NO I want an instant kill". The guy took his first shot with a 375 H&H, Moose flinched and looked around. Second shot, Moose turned and took off running back toward brush. Third shot, Moose verried off and started climbing a bank towards the heavy spruces. Fourth shot, Moose fell over bank into river, started floating downstream. Shooter jumped into his raft and caught up with Moose about 1/4 mile down stream. Managed to get Moose into shallow water and anchored on other side of river. Using block and tackle we were able to get Moose closer to bank into about 6" of water. That is where we spent the next five hours dressing out the Moose.
First three shots all hit the heart. Moose still ran over fifty yards. Fourth shot hit low in the right shoulder, blowing away all the bone connecting the right leg, that's when the Moose fell over into the river. So much for the instant kill theory, still say it's better to anchor animal then worry about killing it if the first shot does not do it. Usually the first shot kills the animal before you can get there anyway. Center of the shoulder shot takes out both lungs.
We watched the gut pile for two days. Many preditors (Wolves and Cayotes) visited the area, but stopped at the water, looked at it and turned and left. Nothing touched it during that time, guess they did not want to get their feet wet. If it had been on shore I'm sure we could have gotten more off it.