1. All firearms are always loaded.
2. Never let the muzzle point at anything you would not mind seeing a hole in.
3. Keep finger off trigger until ready to pull it.
4. Positively identify your target AND what is downfield.
Bladerunner violated number four. He should be charged with 1st degree murder.
if i beleve its a home invasion i am shooting through walls. otherwise i would not because it gives your position away possibly too early.
ALL good rules.
ALL necessary rules.
One rule you did rule out is - Delay due to indecision can lead to your death. You must make quick, decisive decisions.
As most people in such a position find out is that REAL “Bad Guys” back down quickly and retreat as fast as their dead beat feet can move.
However - THAT IS NOT ALWAYS THE CASE.
It is up to you to make a quick (as well as accurate) decision to survive.