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1 20. ABSTRACT (continued) was proposed that propellant grains be made stronger through the addition of small percentages of high strength-to-weight-ratio materials; e.g., graphite fibers It was anticipated that these reinforcing elements would assume the stress* and because of their extremely large elastic moduli would tend to Imxt the strain experienced by the propellant material. This in turn would tend to limit the damage, in particular the fracturing experienced by the propellant grains, and thus limit the gas generation rate. Representative fibers and propellants were selected, mixed, and tested for sensitiveness and mechanical properties. Response to standard sensitiveness tests was relatively unaffected by fiber addition; mechanical properties of a Low Vulnerability Ammunition (LOVA) propellant, CAB/RDX, were enhanced while those of a standard propellant, M-30, were degraded.