You are the second person to disagree with what I said without saying why. You, at least, were polite. If you are going to disagree with someone, it is proper to give a reason, otherwise your argument is only an appeal to authority (your own).
Let me explain what I meant, because I can see I didn't really give reasoning either. Also, understand that I'm try to include how a jury will see this, meaning we want to protect ourselves, but prefer there not be any doubts. Think of Zimmerman at 0 yds and still people had doubts and not go to jail.
To use lethal force three elements must exist: Ability, Opportunity, and Jeopardy. This is a common statement, so I'll assume you know this. If there is any question, a good explanation is here:
http://www.corneredcat.com/article/legal-concerns/ability-opportunity-jeopardy/
I also assumed (which I didn't state) there was one bad guy and one good guy. At 25 yards, unless the person has a projectile weapon (gun or bow), he does not have the ability nor the opportunity to hurt you. Unless he says something or points the gun at you, you aren't in jeopardy (yet). If he starts shooting, you are or if he starts moving towards you, pointing the gun at you, you are. At that distance you may have a good chance of getting away and if you can, you should. SYG or not, why have to justify it? Why kill someone if you can just get away? Even if it's a justified shooting, you'll probably be sued. And unless you have insurance that covers that, you could lose your savings and house.
What I said about the longer sight radius is based on what I've been told and read by self defense instructors. When you're being threatened, your fine motor control disappears. You will get a huge shot of adrenaline. Think of a time when you were scared <
deleted>; could you have aimed a gun carefully? I shoot USPSA and when the buzzer goes off, you get tunnel vision and stop consciously thinking. That's nothing compared to being attacked.