A single stage high explosive system for accelerating macroparticles has been designed and tested in order to investigate the various parameters. Velocities to 7500 fps were achieved with an aluminum projectile weighing approximately 4.5 grams. Damage to the projectiles became so great (mass losses to 40%) that the program was halted. Suggestions are made to show how the methods of acoustical impedance matching could help prevent projectile break-up.
