I recall a dear departed friend, who grew up poor on the Red River in TX, telling me of using 16 ga. shells in a borrowed 12 ga. gun. He had somehow acquired the 16 ga. shells but knew no one who had a 16 ga. gun he could use, so he wrapped several layers on friction tape on them and shot ducks.

Seems like it would have split the heads, to me.

May God bless America and those who defend her.