I am wondering what every one feels is the best caliber for north american deer. My brother uses a 300 win mag which I consider to be a bit of insanity but it's his shoulder. Right now I'm usin a 303 british but am considering upgrading before next winter. I am leaning towards a 30-06 just becuase of it's versatility in reloading and use. Maybe the .308. Then again I doubt I'd need anything bigger than a .243. So what do you guys think?