I agree that trying to kill two deer with one shot is not the way to go. You never know how hitting the first animal can and will deflect the bullet. This was easy to see in my first example where the second deer hit was to the right and 20-30 yards above the first deer. It never crossed my mind that this was going to happen. The second time I was not looking for another deer behind the first deer but it was lined up perfectly. It again was a total suprise to me. Mule deer seem to have a habit of herding together.