The 270 WSM is easy but one of the 6.5s would be nice, not sure if they edge out the 7mm but recoil would be milder. If you wanted to get Looney a 9.3 WSM could be interesting.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli