My Leman Russ unloaded its full fury upon 2-3 Warriors (prime included) and caused a total of 5 instant death wounds. And no one died. Only to take some wounds. (with the help of cover saves or special saves)
Bols have an article on this very issue.
And yes this really is cheating. (much to my disgust as I found out in my last battle!)
~Don't worry I'm not pissed or anything. Just that I like to play friendly and relaxed so when a rule seems super twisted (till it makes no sense) I tend to get a little upset.