I will be honest, I seldom hold to intentionally hit the high shoulder but it often turns out that way. When I hunt at long range, which to me is anything 500 yards and out, I will take a center hold on the shoulder to allow the most error in all directions and still get that bullet in the vitals.
In the area I hunt, putting the animal down on the spot is a good thing but in no way a requirement. May mean a longer haul out but other then that, there really is no way to loose a mortally wounded animal.
I think that the high shoulder shot can get you into trouble, espeically with some specific species of big game animails. Many do not realize that game such as elk, moose or buffalo have huge dorsal spines on their spine. Generally the top third of a bull elk of moose will not result in a one shot kill. It may drop the animal to the shot but I have seen many situations where a hit on the top 1/3 of these animals resulted in the animal regaining their feet after several minutes.
On deer, the distance from their spine to the top of their back is much less so a hit to the top 1/3 of a buck is generally a fatal hit. If nothing else, the spine is generally broken and the animal is unable to move.
In my case, the spine was not physically impacted by the bullet. Both shoulder blades were broken and that was obvious when the buck tried to run as he could simply paw with his both legs and did not have good control of any of his legs telling me his spine was severely stressed.
For all intent and purpose, this buck should have died long before he did. My only real reason for posting this is to say to be prepared for anything when you walk up on your "Dead" big game animal.
I will post some pics when I get a chance.