JP> -> Don't know--though the total energy is equal to heavier, slower
JP> -> rounds,
JP> 
JP> Velocity is EVERTHING when it comes to defeating body armor.
    No.  Bullet deformation is what allows Kevlar body armor to stop bullets. 
 That's why Eastern-bloc .380 ammo with sintered-iron core will go through a 
vest despite low velocity.
JP> John is filling the jacket with epoxy, which can be pretty tough.
    Will it deform on hitting a hard object?  (One test might be to make the 
slug and hit it with a hammer!)
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