The ambient temperature sensitiveness of blackpowder formulations was found to be relatively unaffected by prior elevated temperature storage, whereas the results for pyrotechnic flash composition indicated that there was a significant change in sensitiveness as a result of previous temperature exposure. Both the single and double based propellants became more sensitive to friction after short term storage (1 day) but this trend was reversed at the end of 10 days. The behaviour of the nitroglycerin (NG)-containing explosives was found to depend on their NG concentration; high concentration materials became more sensitive, while lower concentration materials became less sensitive.