Edged weapon lethality.
It’s zero at 20 feet, and that is my intrusion limit.
I suppose they are not used any more but I used to throw the javelin competitively. I could go just under 200 feet which is a hundred feet less than a world class thrower but still at 20 feet I could easily kill someone.
Actually the ones used in competition are too heavy imo. About half that weight would be deadly.