Оставил коммент на всякий случай: Oh wow, you're so right — killing Voldemort is comically easy! Just grab your trusty muggle rifle, find a nice open field, and patiently wait for the most paranoid, immortal dark wizard in history to apparate right in front of you... in the wide open... and then kindly stand perfectly still like a cardboard target while you line up the perfect headshot. Don't worry about him instantly teleporting away mid-blink, or having a dozen Death Eaters apparate in as backup, or throwing up a casual Protego that canon explicitly shows blocks physical objects. Nah, ignore all that — wizards only block magic, apparently. Bullets are totally different, guys.
Or here's an even simpler master plan: Just tell teenage Harry — the boy who was raised in a world where wands are everything and guns are primitive trash — to casually wait around with a .38 snub-nose until Voldemort shows up for their showdown. Then Harry can just shoot him point-blank in the face, like Vincent did with Marvin. Truly groundbreaking analysis. The books would have been three pages long if only they'd remembered muggles have guns and dark lords love posing motionless in open terrain. Genius.