I'd suggest the Serbu BFG-50. It's perfect for hunting damned near all kinds of game, from elephant to chipmunks. Of course, if you hunt chipmunks with it, there will not be much left, but hey, who eats or sends chipmunks to the taxidermist anyway?
Always use enough gun.
BTW, I've had a variety of OLD Savage guns. They all still worked fine. They never did appreciate in value, though...