The friction sensitivities (FS) of five linear and eight cyclic nitramines have been determined. These FS values were compared with the respective detonation velocities,D, and with the dimensionless ratio created by relating the heat of explosion,Q_real, to the activation energy,E_a, of non-autocatalyzed thermal decomposition of the explosives concerned. For the nitramaines studied, these comparisons show a general trend of FSdecreasing with increasing energy content.