If the quartering away angle was really steep, who has opted to bust the hip/pelvis to break them down rather than count on a whole lot of straight line penetration which may well not occur given a correspondingly steep angle of incidence for the bullet's impact?
That is exactly what I would, and have done. Between hunting, depredation, and ballistic testing- bullets sometimes do odd things. If I can't see the chest cavity, and I am going to shoot anyways, then center of the tailbone/hip is the first shot. Yes, it requires a follow up shot and the potential is there for the animal to crawl on the front legs, however in a few dozen animals shot that way I have never seen one not go down and allow an immeadiate follow up.
