The characteristics of shaped charges with metal powder liners for perforating borehole pipes are described. The liners were manufactured using powder metallurgy technology. Two types of powder liners were made: a homogeneous one made of copper powder and a heavy one made of copper and tungsten powder blend. Laminar liners consisting of two layers made from powders of different densities were also examined. X-ray pulse technique was applied to research the process of jet stream formation. Radiograms revealed the discontinuous (discrete) Structure of jets formed from powder liners. The corresponding computer simulations of jet formation are presented.