I have always thought that the max caliber for a rifle was .50. I’ve seen 12ga shotguns shooting pumpkin balls then slugs, then rifled slugs and finally rifled sabot slugs. All that I understand can fall within the regs of a shotgun. However, I don’t understand how we can now have rifled shotgun barrels, that are more than .50 inch in diameter.
I have nothing against them. I am just wondering how they are not considered rifles.
Thanks