Can you show one case where this happened in WA State? Remember, if someone is found to have acted in SD and is acquitted in any prosecution, the State pays all his costs. This is enough of a "brake" on that so called "zealous Prosecutor" that it's rare where they have had to pay.
Also remember that Police Ammo is selected for it's ability to STOP the threat. It is usually the most deadly, while still reliable, ammo available.
Lastly, the law allows for the use of Deadly Force in Self Defense. It doesn't limit one to a specific manner in which that force can be applied. If you have to defend yourself you have the right to use the biggest gun with the most deadly ammo that fits in it. The only thing that matters is that you are acting out of a fear for your life, in self defense. This "Use whatever the Police Use" is another myth perpetuated by Massad Ayoob. Just like his "don't carry reloads" statement, he can't seem to back up the claim.