Can a 22 kill a boar with one shot in the head?

Yes, a .22 caliber rifle can kill a boar with a well-placed shot to the head, but it's not ideal due to the animal's size and toughness. A headshot can be effective if aimed accurately at a vulnerable spot, but it requires skill and precision. Generally, larger calibers are recommended for hunting boars to ensure a quick and humane kill. Always check local hunting regulations and guidelines for appropriate firearm use.