Interesting...most of the stuff I've read goes along this line:
"If you ever have to shoot somebody, you WILL be sued (even if no charges against you are ever filed). Having to defend your decisions and actions will be bad enough without the spectre of customizing a "killer bullet" hanging over your head. Far better when asked about your ammo choice to say, "I bought what the police use."
Not in Washington state.
RCW 9A.16.110
Defending against violent crime — Reimbursement.
(1) No person in the state shall be placed in legal jeopardy of any kind whatsoever for protecting by any reasonable means necessary, himself or herself, his or her family, or his or her real or personal property, or for coming to the aid of another who is in imminent danger of or the victim of assault, robbery, kidnapping, arson, burglary, rape, murder, or any other violent crime as defined in RCW 9.94A.030.