one other advantage i saw was that in the test video done by the company it showed a couple different calibers (the ones i remember were 357 mag and 45 caliber) and the rounds were shot into a 12 inch by 12 inch block of clay (which the video said is suppose to be the closest thing to the human body that can be replicated without actually shooting a human). the rounds that i remember (its been at least ten years since i have seen the video) were hollow point rounds and then the rbcd ammo. i don't know what brand hollow points they were but the hollow points would hit the block of clay and have full penetration, exiting the back of the block and you could see the round hit the ground some where behind it. when the rbcd ammo was shot it would hit the block of clay, transfer all of the energy to the clay and really open up the block, there was no exit hole in the back of the block. the advantage i see to this is if you have to use your ccw and shoot an attacker and you hit your target you don't have to worry about your round exiting your attacker and hitting an innocent bystander behind him.