But they could cut a pattern into layers of stamped steel and fill nearly 100%
This munition is designed against hard targets (vehicles, etc) not necessarily personnel. Stamped steel would likely just splatter to pieces against hardened targets. Tungsten (72 on the periodic scale) is very dense, much more so that steel. That density means more kinetic energy gained from the dispersal explosive, and much greater penetrating power.
![[NSFL] Injuries to a Russian soldier, presumably from a GLMRS M30A1 rocket with a tungsten bead warhead.](https://i.imgur.com/hcpH5Mm.png){kind=link}
This munition is designed against hard targets (vehicles, etc) not necessarily personnel. Stamped steel would likely just splatter to pieces against hardened targets. Tungsten (72 on the periodic scale) is very dense, much more so that steel. That density means more kinetic energy gained from the dispersal explosive, and much greater penetrating power.