Dropping them out of the bake is actually annealing/drawing them a bit; the temp to bake isnt high enough to treat the metal and is actually softening it.
Sorry Hawk, that is not correct. Water quenching after baking does harden the bullets. If you air cool after baking, it has approximately the same result as air cooling from the mold. 400°F is plenty hot enough to heat treat bullet alloys.
I can also say from experience that powder coating is nothing like graphite-coated bullets; powder coating is much tougher and handles higher speeds, while being a lot easier to apply.
As to the OP - I didn't watch the video but from your description, it doesn't sound too surprising to me. I don't know that I'd claim a porcelain (or whatever they are these days) dinner plate really simulates bone though since it's a lot harder.
