My pick would be a Winchester pre 64 model 70 Featherweight in .270 Win.

http://www.fieldandstream.com/50-best-guns-ever-made-gun-reviews-in-photos

"There is no magic caliber, and no magic bullet. If there were I would be inclined to nominate the .270 caliber and the 130 grain bullet for the honors. Perhaps no other caliber has compiled, with a single bullet weight, such an outstanding record on such a variety of animals at all ranges. The key to the success..of the..270 is a blend of flat trajectory coupled with versatility and manageable recoil that is pretty hard to match, let alone beat." Chuck Hawkes http://www.chuckhawks.com/270family.htm