Originally Posted by swamp2
As others have pointed out 00 and #1 buck are nearly universal for police, FBI, military, etc. None of these folks use increasingly lethal rounds either.
Law enforcement officers are practically immune from prosecution if their errant rounds should strike an innocent bystander. If I shoot off a slug in my house and it flies out my house, into my neighbor's house and kills someone in there... guess what? I'm going to prison for a very long time. A police officer doesn't have to worry about that. It is completely sensible for a civilian facing the realities of the criminal justice system to choose a different load that will accomplish the objective of stopping a threat, but lessen the possibility of getting innocent people stuck in the crossfire.
You can't compare civilian home defense with police and military work. Very different animals.