John
That is pretty much the standard for a missed brain shot.

However when hunting near a boundary like in DEKA I was advised by my PH that even follow up shots should be directed to the brain, if at all possible, as a heart lung shot elephant could make it into the Park, thus a lost trophy and a lot of Drama.

Fortunately a frontal brain with my 450 No2 and a 450 gr North Fork Solid at 6 yards did the trick.