When anti-tank weapons are used, e.g. against armoured combat vehicles, hot fast fragments can be generated upon perforation of the armour. The propellant charge in ammunition stored in such a vehicle typically makes up a significant volume, and it is a well-known fact that fragments can initiate a propellant charge either through thermal conduction from the fragments or by high-velocity impact. If ignition occurs, the effect in the target can change from insignificant to catastrophic kill. In this study, a literature survey is presented, with focus on mapping out key physical mechanisms of inadvertent gun propellant initiation. Primarily, we look for simple models that can be used in assessment on platform-level. However, detailed physics-based models can also be relevant, e.g. for generating and providing data to platform-level assessments. This study also includes a brief review of a few gun propellants as well as tests for evaluating their sensitivity. Finally, we propose experiments and model development that would bring forward this work.