Oh, I cannot resist. Cops do use ~.22 caliber (.223, the most prolific round now). As does our military, NATO, and the Russian military (5.45mm). lol.Yes, it is fruitless, and you can't seem to understand where ballistics come into play. It is NOT all about "shot placement" ... it's about shot placement AND ballistics, which you seem to discount quite a bit. If ballistics didn't matter much, then maybe the police should all be using .22LR and guys should feel comfortable with a pump .177 pellet gun hunting Grizzly bears. I mean, it "could" be possible to kill a Grizzly bear with a .177 pellet IF the shot placement is perfect.