CH: Interesting test and thanks for posting.
Some comments/observations: Interesting that the 30 cal Trophy Bonded Tip had more frontal area and retained weight than the 338/225 AB.But did not penetrate quite as much.
Second, the 300 Win Mag/180 MRX seems to show that you don't leave penetration on the table with high speed bullet impact, if bullet construction is up to the task.
Water is good, but I wonder what results would have been with some heavy bone mixed in
