IMHO only 1 shot to take that is the vital region. Coupling your first post with the pictures in the second, this shot allows the target area to grow (effectively opening up that margin of error factor that just happens in the real world) when you include the largest organ the lungs &heart in the front portionplus the liver in the rear portion to me their really is no other shot. Look at the size of the target in the 2nd shot example (neck/spine), it does not lend itself to much room for margin of error. Couple that with where you should place the cross hairs onthe hide or compenstating for elements (wind,etc) & bullet trajectory, it shrinks even more. Not to be forgotten what part of a deer or elks anatomy moves the most, quickest and often without notice?

I think your post has good intentions and very useful, don't get me wrong. I just don't consider the 2nd example a real good option...exprience has proven otherwise!

This has been debated numerous times a year and will always continue, just my 2 cents worth.