The paper presents the results of experimental studies of fragmentation of the 6.35 mm aluminum alloy projectiles on the steel meshes with the aperture of 2.0 mm and the wire diameters of 0.5, 0.6 and 1.0 mm at impact velocities of 5… 7 km/s. The projectiles acceleration was produced by two-stage light-gas gun. For registration of projectile state before collision with the mesh bumper and for direct observation of the fragmentation process we used X-ray photography. The fragments projectile was also detected using a thick plate-witness made from AMg6 alloy. The results were compared to the similar experiments carried out at impact velocities up to 3,4 km/s [1,2]. The features of the morphology of the fragment cloud were studied and the direct experimental proof of the existence of the cumulative effect predicted in  was given.