Experimentation says you can. For a few shots, anyway.
This isn't a precision hunting rifle or bird gun you take duck hunting. It's a tool of freedom that may only need to be fired once. Butter knife to get a steak knife kind of thing.
/johnny
I would probably be reluctant to fire one just for the heck of it. If somebody was knocking at the door and I knew it was all over I would fire away. Tyrants are scared of technology like this. When they have no idea which door they knock on somebody has one of these it gives them pause. 30 or 40 million of these would make a big difference .