I have never shot an Eland but just getting back from my 3rd plains game hunt, and were I to have booked your hunt, I would say 286 TSX in a 9.3, 250 TSX in. .338 or 300 TSX in a .375. I shot an Oryx with a 180 TTSX on a moderate quartering shot and the bullet did not reach the lungs. My dad made a similar shot on a 120-pound Blesbok with no exit (both left side which are tougher on penetration because of having to go through dry grass in stomach). Most broadside shots I have seen on Oryx and Wildebeast with Barnes bullets have not exited, probably because of robust muscle structure and 3/4" hide over the shoulders. I am starting to see why PHs preach tough bullets in really heavy weights.