If that were the rule I would load nothing but #6s, When Leo was asked what size shot he shot he said I would shoot #6s if they allowed them. Why because #6s one pellet will break that target w/authority. When you center a target from the 27 using 1 1/8th oz #6s there is nothing but smoke, I know because that is what I shoot, I do not need to buy 2 sizes of shot, use the same shot charge 1 1/8th oz on all of my loads, from 1200fps to 1550fps in all my shootoff shells too. Gary Bryant.........................Dr.longshot