2. Cork Bullets
3. Tear Gas Round
4. Regular rounds
Something tells me not to do something like this for personal defense. Police go to trouble. They have backup and a little more control than the homeowner does in the middle of the night.
They have liability issues. We have them too. But this sequence was probably determined by a committee in a conference room with a LOT of emphasis on liability and on how the police come upon deadly situations.
The rest of us come upon them by surprise (if not, then it's pretty much not self-defense). By the time you get to your first regular round that hits, you might be dead.