I see these reports of people taking a whole magazine or more from a service pistol and not dropping. Where are the bullets hitting the target?! If two rounds in center mass don't stop, I think a brain shot is indicated.
I carried a revolver on duty and didn't have the luxury of spraying 15 or more rounds without result. I also think that many rounds fired looks bad to a DA or grand jury. And it may get you killed if the opponent is a decent shot or coming at you with a knife.
I do feel that cars should have both a rifle and a shotgun. Here, the officers buy their own rifles, but I think the dept. gets them a discount.
If a dangerous zoo animal has to be put down, the 12 ga. slug probably works best, if the rifle is 5.56mm. If it's a 'scope-sighted .308 or .30/06...but how many urban officeers carry rifles like that?
I thought of this after reading Massad Ayoob's account of a New York zoo shooting of a polar bear and of the wild animals that got loose after a nutty private zoo owner shot himself. What that latter incident proved about police marksmanship and target knowledge is disgraceful. I'd hate to face an African lion with a .223 carbine, but I know where to hit one. Even most cops who hunt probably don't know, and that can get someone killed. I firmly believe that public zoo personnel need to have adequate rifles on hand and be trained in where to hit various animals for a quick kill. But a lot don't want the responsibility and may even be animal huggers who won't do the job.