The shock sensitivities (viz, impact and friction) of composite modified double-base (CMOB) ingredients, double-base (OB) matrix (SNC:CL) and the effect of high energy materials like ammonium perchlorate (AP), cyclotrimethylene trinitramine (RDX), cyclotetramethylene tetranitramine (HMX) and pentaerythritol tetranitrate (PETN) on a CMDB system, have been studied. Individual ingredients of OB matrix, i.e., spheroidal nitrocellulose (SNC) and desensitised nitroglycerine (casting liquid (CL», do

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... t appear to be very sensitive to impact and friction, impact height of 50 per cent explosion being 144.0 and 166.0 cm, respectively and friction figure of insensitivity of 36.0 kg each. Various OB mixtures gave impact ranging between 56.5 to 61.5 cm and friction insensitivity of 36.0 kg for all the formulations. But addition of AP to OB matrix increases the impact and friction sensitivity tremendously, impact ranging from 15 to 24 cm and friction from 2.0 to 3.2 kg. Sensitivity-wise addition of RDX, HMX, and PETN to OB matrix follows AP while the addition of .4/ slightly reduces the sensitivity.