Never point a gun at someone that you aren’t ready to kill. No non lethal rounds, if they pose a threat to your life you should be prepared to put them down for good.
in Canada, if someone used a non lethal round on an intruder the judge would ask them, “why did you point your gun at someone, and fire a shot at them, if they weren’t enough of a threat to your life?” This is our law system up here, it is very against the law to point a gun at someone up here even for an intruder, they absolutely need to lose a threat to your life.
in summary, if you are willing to point a gun at someone, you should be prepared to take their life.