Comment: Re:Wake me up when ammo can be printed (Score 1) 511
I actually just watched a video of the test-firing of various 3D-printed shotgun slug designs. Of course they weren't using rifled barrels nor did they add spin control to the design so the slugs tumbled in flight rather than spinning, but they were still quite effective at short range.
It's actually a great idea for being able to produce your own less-than-lethal rounds, which are otherwise difficult to procure.