I can't even believe I'm taking the bait but...
what experience with firearms do you have? Once again it sounds an awful lot like you're shooting your mouth off on topics you aren't informed about.
A handgun bullet is much smaller (much less mass), travels at a much slower velocity, and decelerates much more rapidly than a deer slug or rifled bullet.
Hunters buy specific rounds for hunting deer, because it takes a larger ordinance to kill a deer humanely (you want the round to do enough damage to kill it outright... not wound it).
Add in a miss or two, and add in the desire by the cop to kill the deer VERY quickly after the first bullet hit it, and 6 shots fired from a sidearm isn't too insane.
So... yeah. Clearly not the optimal weapon. But people saying "omg six shots!" remind me of news stories were the newspaper freaks out about 17 shots being fired at some suspect like it's overkill, when in truth it's the equiv. of every cop on the scene just firing twice, or something.