[Enterprise]

Fascinating if true. I hope someone can shed further light on this.

[Rifleman]

Most unlikely. The cops have been emphisizing the .223/5.56mm bullet. I think a projectile fired this way would have distinctive marks on it (dented base if nothing else. This is also a VERY low performance way to fire a bullet. It would be hard to kill someone with a 40 or 60 grain bullet moving at the low velocities that this gimmick would produce.

There is a principle of thought called Occam's Razor. Meaning don't invent complicated scenarios when simple ones will do.

[Falcon4.0]

Just from an engineering stand point you can tell it's a crock of BS. It takes X amount of energy to fire a bullet Y distance. You can't have less energy in the chamber so as not to make as much noise, but send the bullet a greater distance, which means a higher velocity. What we have hear is the "Black Rino" type urban legend. I have some backgrond in this as I work for a large multi-national corporation (wink wink) and was assigned to work on improving the performance of bullet proof vests.