Related Rule
Practice Relating to Rule 78. Exploding Bullets
The Military Manual (2005) of the Netherlands states:
The use of bullets which explode or ignite in the human body is forbidden. This prohibition does not apply to tracers, combined or otherwise with normal ammunition, or to exploding small-calibre ammunition intended to disable aircraft or materiel. 
Netherlands, Humanitair Oorlogsrecht: Handleiding, Voorschift No. 27-412, Koninklijke Landmacht, Militair Juridische Dienst, 2005, § 0427.
The Definition of War Crimes Decree (1946) of the Netherlands includes the “use of explosive … bullets” in its list of war crimes. 
Netherlands, Definition of War Crimes Decree, 1946, Article 1.