1) Any gun you have when you need it is better than the gun you don't have. Does a Draco seriously fit that bill better than other guns? Will you really carry one more readily than a 12 ga. shotgun or a high energy revolver?
2) It is always a good idea to consider exactly what threat you're preparing to face. In this case, bears are not the same in all places. Black bears are fairly non-aggressive, smallish, and not enormously tough. A small-to-medium game round, and even some Magnum handgun rounds, may be enough to convince him/her to leave. If Mr. Bear's first name is Brown, Grizzly, Kodiak, or Polar, folks don't start feeling not-too-under-gunned until they're toting a 12 ga. loaded with pretty snorty slugs. Is 7.62x39 mm the kind of round you'd believe capable of dispatching the critter you're worried about under perfect hunting/ambush conditions? If not -- if you wouldn't carry a 7.62x39 even to hunt a bear -- why would you believe that it's a good choice for killing one that's charging you in a split-second, adrenaline-fueled fury?
3) If you think the threat you might face is serious enough to burden yourself with a weapon because you believe you might need to use lethal force to kill it rather than be killed yourself, it is of utmost importance that you actually be able to HIT IT with the weapon you're planning to carry. The gun then must be two things: a) powerful enough to do the job, and b) the gun you are able to shoot with the greatest practical accuracy, as fast as possible. If you think this a Draco fits that bill -- you haven't shot one enough yet.
4) When you are contemplating saving your LIFE from a violent attack of any sort, this is not the time to bring out your "kewl" range toy. Pick the most effective weapon you possibly can, and prove to yourself that it is, bar-none, the one weapon with which you can kill something in the least amount of time, under any conditions.
5) "Bear" threads are a running joke here. "Practical uses for Dracos" threads are just plain jokes. But combine the two and we'll take the idea seriously!