Aluminized high explosives are known to give better underwater performance All explosive formulations for underwater targets are filled into warheads and she by casting method TNT. a high explosive is used is casting medium due to its lower melting point Plastic bonded explosives are fast replacing TNT-based high explosive formulations for the reasons that they are more insensitive and low vulnerable explosives with better shelf life Few aluminized plastic bonded explosive formulations based on RDX. aluminum. and HTPB have been processed. varying the aluminum content from 0 to 35% and evaluated underwater The present paper discusses the experimental methodology adopted to evaluate the above formulations for their ballistic parameters. viz peak over pressure and impulse Explosion bulge tests have been conducted with each explosive formulation and extent of bulge in test plates is presented and compared with a standard underwater explosive. viz. HBX-3