I got some .22 to play with. It’s wildly underpowered, which is the point I guess. Coming out a pistol, it spreads really fast (see video above). I doubt it would seriously wound a rat at 10’. After some very informal testing, I doubt it would go through 2 layers of sheetrock, and maybe not one. (Depends largely on barrel length.)
Also, anything you would shoot these out of is going to have a rifled barrel. Makes shot (pellets) come out in a pinwheel. I have a 410-gauge derringer I’d dare you to shoot me with from 15’. LOL, I’ve never got a single pellet on a 3’x3’ target at 8’, it’s really that crazy bad. Maybe if there was a snake right at your foot or something? 🤷🏻♂️
And now I see they have .45 rat shot. Thanks OP. I really didn’t need this rabbit hole tonight.
EDIT: Damnit OP. $2 each before shipping, so probably $4 each. Too rich for my blood. Why did you start me on this?!