From medieval tapestries, we know that slingers were capable of hitting birds in flight. They were incredibly accurate. When David lines up — and he's not 200 yards away from Goliath, he's quite close to Goliath — when he lines up and fires that thing at Goliath, he has every intention and every expectation of being able to hit Goliath at his most vulnerable spot between his eyes.
Por los tapices medievales, sabemos que los honderos eran capaces de acertarle a pájaros mientras volaban. Eran increíblemente certeros. Cuando David se prepara, y no está a 180 metros de Goliat, está bastante cerca, cuando se prepara y dispara a Goliat, tiene toda la intención y confianza de ser capaz de acertarle a Goliat en el punto más débil, entre los ojos.