Point blank (which may come from the French phrase pointé à blanc, referring to an arrow being aimed at a white spot at the center of a target) has nothing to do with close proximity to the shooter. Rather, point blank range is the distance at which a weapon aimed at a target succeeds in hitting it — where point of aim (e.g. the middle of the crosshairs) is the same as point of impact.
NOT TRUE TOTALLY, in guns, there are TWO positions where a sight is 100% accurate... one of them is a few feet from the barrel as a bullet arc upward, and the other is a DIFFERENT distance, not the same distance as you assert, and this other distance is down range when the bullet drops enough to make the sight 100% accurate a second time.
Read the article fully.
Useful addition, thanks.
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