Drops Prince Rupert, they’re the Batavian tears and the Bologna flask is frozen droplets of tempered glass with incredible strength. It is possible to hammer and they will not break. How they will react to a bullet?
Drops Prince Rupert to very easy, Just drop the hot glass into water. The resulting drop with a long tail has incredible strength, even the hydraulic press does not take. But if it is hit on the head drops. If you break or damage her tail, the drop literally shatters into fragments, and the detonation velocity is huge, about 1.2 km/s. Test hydraulic press bullet survived, but will withstand a direct hit by a bullet?