posted on May, 25 2013 @ 12:27 AM
Honestly, the technology involved is amazing, but, to be clear, they aren't printing bullets. They are printing out pointy plastic bits and firing
them out of a shotgun.
The fact that they have to embed ball bearings in them to keep them from fluttering around like so much pvc confetti is telling.
They would be better off duct taping a roll of dimes together and firing them..
Shotguns operate on relatively low chamber pressures, unlike a rifle. I'd predict attempting to fire one of these through a high pressure, rifled
barrel would either shred the projectile before it got to the muzzle, or blowing the center out of the projectile leaving a sad, hollow plastic
obstruction just north of the chamber throat.
Finally, a metal projectile, at the moment of firing deforms at its base to seal the hot expanding gasses behind it, something like the piston in a
car motor. This process, called obtration (man, I hope that's spelled correctly) also allows it to engage the rifling on the inside of the bore,
causing it to spin on flight, stabilizing it in flight.
And, the B.C. on these things would be as close to zero as makes no difference...
I'll stop typing now.