Deadly force is *always* justified when a person has good reason to fear death or serious injury at the hands of another.
I am 75 years old and will lose a fight with a young thug. I am very adept with firearms for 60 years. I will make every effort to not use my weapon. I will try and defuse the situation. If I can leave the area safely I will. Trying to leave and not being able to means a lot legally. If you are aggressive and continue to approach and I have my weapon in hand, at 21 feet I will shoot you center of mass. Less than 21 feet and the bad guy can get to you before you fire your weapon.
Be alert and vigilante. Avoid areas where trouble may come to you. If it comes to you, be prepared.
I live in Texas.
Yeah but they dont see it that way when a male uses it on a female. Like its just not possible. Tell that to the delivery guy who had three women attack him with pipes and steal his car.