* fun fact of the day - hollow point ammunition, expanding rounds, dumdum bullets etc are banned under the hague convention for use in conventional warfare as the wounds they produce are so horrific and damaging and deemed to be 'inhumane'. For some reason frangible ammunition does not come into this category. I find it amusing that the military cannot use this type of bullet and yet it is pretty much standard issue for police (I know about the over-penetration arguments).
Really, I thought it was illegal for anyone to use except by Air Marshall's? Last thing you want on a plane is for a bullet to pierce the fuselage.