Worlds FASTEST Airsoft BBs + MACH 4 What will they destroy

We utilized an adapter that is meant to propel crossbow bolts using a powder charge at high velocities (instead of using compressed air). This was proposed to us by Joerg Sprave of the Slingshot Channel since he could not legally make this in Germany. He and I have also wanted to do some sort of collaboration for quite some time. The barrel of this has a 6mm ID and Danny discovered an airsoft bb would fit perfectly inside. He created a bunch of. 38 loads using various amounts of powder. Not TOO ba