Fit inside a shotshell cup probably not, key word being probably. Problems will happen after they leave the muzzle because of their shape. Wad falls away and their ballistics will be horrible, they will lose velocity fast and most likely spread out all over the place so forget about patterns unless you are belly button to belly button with your target. Things will get shot you never intended to get shot and your target will probably be the only thing not in danger. I would strongly advise against this particular experiment.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.