I was thinking of saying the same thing. There are no brownie points given for taking the attacking dog down with one shot. The only thing that matters is that it doesn't do harm anymore.
You have 10 rounds in the gun (at least a reasonable 9mm does) so you shoot at the first safe opportunity. Dogs are fast creatures; that pitbull could be all over you in a second. You don't have much time; but you have 10 rounds in the gun and 20 more on the belt.
On top of that, a brain shot of a dog would require either a lucky hit through a cranial opening (eyes, nose) or a lucky penetration of the cranium. A bullet can easily bounce. The impact of the bullet is exactly the same as the recoil of the gun; if you can take it, the dog also can. A glancing impact may have no effect at all.
>> The impact of the bullet is exactly the same as the recoil of the gun; if you can take it, the dog also can.
LOL, that’s a ridiculous description. You must account for distribution and inertia.