A few years back I too was considering what to do with my old, sporterized 1917 30-06 rifle... 338-06, 35 Whelen, 9.3, 375...

Tried some 220 and 200 gr bullets in it, left it as a 30-06, and now my son uses it regularly to take bucks 'n bear.

Simple, effective, easy. However, it's not a "medium bore." Just a great old rifle still working well, 100 years later!

Regards, Guy