A lot of good answers on this thread.

I'd have to go with the 160gr NBT out of my 7mm STW.

The OP did say one bullet, so why not also load that in the 7mm-08, and .280 AI?

You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.

You cannot over estimate the unimportance of nearly everything. John Maxwell