Sensitivity to propagation of an explosive can be ascertained by a method called the Ardeer double-cartridge, or ADC, test. The ADC test consists of firing an explosive cartridge with a standard detonator and determining the maximum length of the gap across which the detonation wave will travel and detonate a second, or receptor, cartridge. Both the primer and the receptor cartridges should be of the same composition, diameter, and weight.