Not to hijack this thread further, but seeing as it has strayed already, here goes: Regarding shoulder shots vs lung shots, I have shot numerous black bears with heart lung shots with my 300 Winchester Magnum and had to pursue more than one into thick bush for retrieval.
Well this June I was in a situation where I was sneaking along a semi-closed in forest service road, and suddenly at 40 yards away spotted a bear feeding by the side of the road at around the same time it saw me. It was broadside at first, but turned kind of 3/4 facing me and I could tell this was the split second before he bolted so I swung the rifle up and when the crosshairs were on the front shoulder I shot. I use 180 grains Nosler Partitons and wanted to "anchor" him in place as has been mentioned above in other posts. It didn't work. He bolted downhill. There was plenty of blood but I waited half an hour than went after him and he had gone straight down and then diagonally down across the mountainside though the devil's club and underbrush. I found a substantial puddle of blood at one point as if he had stopped for a while, but then the blood trail continued downhill until finally I lost it.
Swept back and forth and back looking for more sign but never found any.
So much "anchoring" shoulder shots. It still makes me sick thinking of it.