Being able to reflect on a few deadly charges, one including a big brown bear, no handgun is good medicine unless it's the only weapon you have. I found a charge to be just like combat, little time to think, only time to react, you do what you have trained yourself to do. good or bad. The other side of the coin is that you will never use a handgun except at VERY close range, just beyond the range of the other guys knife, or in this case, the bears teeth, unless you deliberately hunt with a handgun, then you have brains enuff to arm your guide or buddy with a big caliber rifle. With the above in mind, arm yourself with what you are trained for, in your case a large caliber auto. I like the 10mm, my AMT Javelina is a suberb weapon but the longslide is a bit clumsy. A Glock in 10 mm should do the trick for you. You'll never successfully make anything but a head shot anyway. any other shot in any other location, except that lucky spine shot, with any other handgun in any caliber will only slightly prolong the encounter. DOC