FN Five-seveN USG, Dark Earth, Adjustable Sights, 20RD

The FN Five-seveN® single-action autoloading pistol fires the low-recoil 5.7x28mm cartridge making it ideal for personal protection, target shooting or NRA Tactical Police Competition. It features a textured, ergonomic polymer frame with checkered panels for enhanced grip.

Accurate out to about 100 years so yes, you could hunt with it.
It is a pistol that fires a small rifle shell
It is powerful, and nice and pointy, so not much is going to stop it.
20 rounds in each standard clip
Light ammo so you can haul a shit load of it.
Low recoil for easy target reaquisition after each shot fired.

The only down fall.
1. cost at almost 1100 dollars, but what is your life worth.
2. ammo is hard to get, so you would need to stock up, and forget about scavenging for it later.