Funny you say that. #4 buckshot loaded right has a very similar velocity and weight as 22LR out of a shotgun. Except it all arrives at once, 16 or 17 pellets in a 12ga a few less in a 20ga. The question is you want some?
Remember the philosophy of the Viet-cong. They didn't need to kill you, just wound you. It takes 3 men out of the action.