Sawed off Shotgun: Short Barrel, Big Spread?

I am so surprised by how small the groupings are. I thought buckshot was going to go fucking everywhere lol - like in a video game

#HideousDestructor’s spread for the super shotgun seems very accurate - though I probably shouldn’t be surprised by that hehe

I wonder about muzzle velocity though. how far could 12ga buckshot penetrate into ballistics gel from this shotgun?