I didn't know the Russians has developed a hollow underneith the jacket that causes the bullet to 'deform' - trust the Russians to think of that one.
Regarding the Geneva Convention and the beheadings, I am beginning to think we are the only ones to do conform to International Convention.
I know I have heard of the Hague Convention before but simply "spaced it" so - thanks to each of you...
It appears the most applicable part of the Hague Convention of 1899 isn't what I quoted in my earlier response but is instead Declaration III which can be found here.
http://www.yale.edu/lawweb/avalon/lawofwar/dec99-03.htm
"Laws of War : Declaration on the Use of Bullets Which Expand or Flatten Easily in the Human Body; July 29, 1899"
I was close, but still not really correct.