Well BT, I have witnessed just the opposite. Most of the deer I have seen shot with a 30-30 just keep walking for at least 100 yards. One hole in, one hole out with not much damage. The 243 on the other hand makes jelly out of the lungs on every deer I have seen shot with it. Most stop in their tracks or within 40 yards. Try using a premium bullet in your wifes 6mm and you will see what I am talking about.