What challenges arise when developing a .490 caliber impact munitions weapon?

john hayes
My name is John Hayes, I am the owner/inventor of the Hayes Less Lethal hand held, .490 caliber, impact munitions weapon (hayeslesslethal.com). I have been working hard at this project for 10 years, have 5 issued patents 4 US, and 1 Foreign. I have no Physics background but, for obvious reasons, I am becoming much more interested in the field of physics.
 
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