A single grain rocket motor was designed to be used in a shelf life assessment and extension program for a solid double-based propellant multi-grain rocket motor. The qualification of the single-grain rocket motor has been performed through several static firings to measure the different ballistic characteristics at different temperatures. The purpose of such qualification firings was to approve the suitability of the design of the single-grain rocket motor to give comparable ballistic performance to the multi-grain rocket motor, which should match the original specifications of such motors.