I have been collecting and studying tank fired APFSDS ammunition for a while now and these two photos show something completely new to me. In most APFSDS designs that I have seen designers use “Denal Wads” or cylinders under the windscreen of the sub-projectile. On impact, these wads compress and prepare the penetration zone for the rod. The wads also prevent the core from rebounding or ricocheting at high angles of incidence. In this case, they seem to use loose shot like spheres instead. Has anyone seen this before, know anything about it?