Well i guess I should have you as my PH next time because the PH I did have insisted on a brain shot. I shot my elephant within 100 yards of the river that is the International border.
I used 400 grain Woodliegh Solids and the elephant went straight down on the first shot so it seemed to work quite well.
And to me shooting an elephant is just different than other animals. It is a highly intelligent and social animal. After being in amoungst them for 9 days (we saw elephant every day of the hunt and got very close most days) I felt the elephant deserves a fast clean death. I understand a heart shot can be considered fast and clean. But a brain shot is just flipping the switch off. Instant.
Not saying I condemn or would refuse to take a heart lung shot in the right situation... But on my hunt with that PH it was a decision he was making in each instant. He had two reasons 1. As mentioned regarding the border. 2. In his experience when an elephant dropped instantly, it's companions quickly moved off. When a heart/lung shot was taken and the beast died more slowly, any herd mates would stay around trying to get their fallen comrade back up. His experience was that it was an emotional and very dangerous situation.