Thanks for the welcome, I used a 308 for years and it did everything I needed it to do but for some reason I have become a speed freak and now own a 270 wsm and a 300 win mag, to answer my own question I would probably take my 270 wsm using Winchester accubond 140 gainers as my "one gun".
It has tons of speed and energy to take out our Canadian Black Bear and Moose