On elephant brain is a very good option and to look at it from a different angle your trophy ( the Tusks) are out of the bullets way unlike buffalo for example.
I seriously don't want a lungshot heart missed elephant close to me.If you cannon has enough power a near bgrain will stunn the ele or even put it down and agreeing with some of the previous meesages it does give you a little more time for a second shot.
-------------------- "Hunting is a way of life"
Bigfive,South Africa