Some years ago I watched a documentary about archery. The really good bow hunters gave a fine accounting of themselves. Then, switch to Mongolia and the descendants of the Mongols. These guys lived with their bow. They would race around on horses and hit, every time, targets like apples, balls, etc, from running and rearing horses with their short, stiff bows.
And guys like Bob Munden hitting an egg at 100 yards with a .45 acp 1911; and that's just starting his accomplishments. So many of the old legendary shots are suspect and could easily be a product of luck. But if one has talent and lives with his weapon, upon which his and his family's survival depends, it's easy to see that there is a rarefied level of skill that we'll never know.