She only needs one shot thru the engine block to defend her groceries from them looters

Magazine capacity is a meme, it's self evident larger bullets are superior to more quantity of smaller ones. This is obvious.

DEFCON 1

If it's any smaller than a golfball sized hole then it's not capable of defense, simple as

Please standby, I am going to right a 12 page dissertation on how the blunderbuss filled with nails, rocks, and piss is the ultimate CCW