One of which was done by someone who was kicked off a shooting team for being a dangerously bad shot.

Give me a modern 30 cal hunting rifle, a good scope, ammo, and a benchrest at a 200 yard range and a target. I could teach you to hit a head-sized target in an afternoon, including time to dial in the scope. Hardest skill to learn is calming your nerves when it's a real human head.