agrab0ekim
I believe, and might be mistaken, that the ICJ made it clear, 20 some years ago, that a hollow-point is not the same as a dum-dum, mainly due to the intent in design, changes, and the like. Further, since Dum-dum are not the same as a hollow-point, it is arguable that we never enabled hollow-point bans, thus not international law.
I will check in class later (int. crim law, same prof for all of my int. law, and we did dum-dums so will ask)
the first "Dum Dum" was a case of the British stripping the tips off the jackets of standard jacketed rounds. they got their name from the Dum Dum Arsenal, which was a munitions plant near Calcutta, but closer to a town called Dum Dum ( hence the name ).
these first "dum dums" ( closer to modern "Jacketed Soft-Points" than modern hollowpoints ) were ineffective, though, because the jacket never covered the base of the round, meaning the slug would fire through the jacket, leaving the jacket as additional fouling in the weapon.
the solution, as it turned out, was to encase the entire round in a copper jacket, and include a hollow in the tip of the round, which would cause it to expand. these, too, were called "dum dums," even though they were not made at the Dum Dum Arsenal, instead being manufactured back in Britain. the name Dum Dum had just stuck as a general nickname for expanding rounds.
the Hague Convention of 1899 did not ban "Dum Dums" by name, it banned expanding bullets, and was a response to the British using Mark III and Mark IV Dum Dum rounds, which were of the newer design, with a hollow carved out at the point of the bullet.
in the end, though, the decision to ban expanding ammo was made off of faulty data, bad science and propaganda, but it was made, and is legally binding, and was brought about as a response to a round that had a copper jacket and a hollowed-out point. how a round with a copper jacket and a hollowed-out point could be seen as anything other than a jacketed hollowpoint is beyond me, but you seem to be trying to make a distinction where none exists, and furthermore are doing so in an effort to say a law doesn't apply because one's a "hollowpoint" and one's a "dum dum," when the law in fact bans expanding bullets ( calling them "expanding bullets" in the wording, rather than just saying "dum dums" and leaving it at that ), of which the hollowpoint most assuredly is, while "dum dum" is just a slang term
for an expanding bullet.
sources
http://en.wikipedia.org/wiki/Hague_Conventions_%281899_and_1907%29
http://avalon.law.yale.edu/19th_century/dec99-03.asp
http://en.wikipedia.org/wiki/Expanding_bullet
http://www.thegunzone.com/dum-dum.html