. "These actions are hard to do one handed and a sling allows the user accomplish these actions without putting the gun down ??? DO NOT DISARM YOURSELF. Mas Ayoub, another authority on firearms, suggests that #2 or #4 shot is probably optimal in situations such as we are discussing. 00 buckshot and #7 1/2 shot will work but considering things such as penetration of home walls and effectiveness on the" . . .