What is the explosive filler for the M30 practice grenade?

The M30 practice grenade contains black powder as its explosive filler. Black powder is a traditional explosive that has been used in various pyrotechnic devices and munitions for many years, valued for its relatively low cost and effectiveness in producing a loud noise and visual effect without delivering lethal force.

In the context of a practice grenade, which is designed for training purposes, the use of black powder allows for a safe simulation of combat scenarios, providing auditory and visual feedback to trainees while minimizing the risk of injury associated with more potent explosives. Black powder's properties make it ideal for this application, as it produces a distinct explosion sound and smoke without causing harm, differentiating it from other explosives that may be used in live ordnance.

Other potential explosive fillers, such as smokeless powder, Composition B, or nitroglycerin, serve different purposes in military applications and are not appropriate for a practice grenade due to their higher levels of danger or their intended use in live munitions.