For those interested in 9 mm, this publication solves the questions about the use of hollow-point 9 mm ammunition by American military personnel.
“The MK 243 Jacketed Hollow Point (JHP) Cartridge is required for use in situation where high lethality and limited over-penetration of target are necessary to meet mission profile. This ammunition is critical for providing enforcement agents with means to reapidly incapacitate dangerous criminals in situations warranting the use of deadly force…”
“…restricted to Law Enforcement use (Hollow Point Ammo banned by International Treaties for Military Conflict).”
"All Army stocks placed in ammo condition code B (restricting use to Army Law Enforcement in the continental U.S., Hawaii, Alaska, and U.S. Territories).
So, as far as the military is concerned, it seems it is only used by Military Police and at U.S. and U.S. Territorial bases only. It is not issued for military combat. Of course, there are many overseas situations that are not “military combat.” Terrorists who wear no uniforms are not soldiers, but rather criminals, and not entitled to treaty provisions regarding enemy soldiers. So, it puzzles me that the JHP ammo is not issued for use against terrorists overseas, where US troops are engaged.