"There is a similar rig that does work, however. It is called a "nut-buster" and is featured in Kurt-Saxon's "Poor Man's James Bond Vol. 1." You take that same shell, glue fins to it, and affix a small cork to the primer with a nail in it pointed inwards, so that the shell itself has effectively become a dart. You then lob it into a crowd, and upon impact it may discharge, blowing the crotchal regions off of any poor bastard unlucky enough to be caught above it. Best served in volleys so as to maximize the element of surprise and kick off an ambush or assault. "

"I think he literally meant taping a shotgun shell, business end up, underneath a can of bug spray so that when it discharges the can explodes.... which is about as aerodynamic as a napkin, and half as likely to cause any significant injury. "

"Well, there are a little invention called flechette shells... they are about thirty little steel darts loaded into a 12 gauge shell on top of a wadding. They are devastatingly effective - My buddy's bought the darts by the pound and loaded them into some high brass (comparing weights shot vs flechettes) and we've penetrated through reinforced firedoors with them, 000 Buck doesn't penetrate as well as flechettes.

http://www.cheaperthandirt.com/AMM005-1.html

Try them out. Cheapest way to do it is buy them by the pound and get some 12 gauge or 20 gauge 7.5 shot, snip the top of the shell's husk and pour out most of the shot, load in 20 flechettes and seal it back up - works wonderfully."

"Don't get me started on this, I have ideas on this, that would make the tokyo subway gassing look like a sneeze"