Ive been thinking about getting another one already this may be a good reason to tell the wife lolI'd go with a Magnum, but maybe not for just one hunt?
308 will kill one good!
I think a 180gr accubond or partition would be perfect from what I have seen recommended. The .308 with less recoil than a .300 means you can practice more.308 with 180gr Nosler Partitions will work fine.