The pyrophoric qualities lend themselves well to igniting ammo racks, but this quality is secondary to DU's density and fractal patterns. When it strikes a hard surface, it doesn't just ignite, it fractures in such a way that the tip of the penetrator remains sharp. Remember, its flammability doesn't matter much if the fires it starts are outside of the target's armor; it's when fire gets inside the tank that things get spicy.
The pyrophoric qualities lend themselves well to igniting ammo racks, but this quality is secondary to DU's density and fractal patterns. When it strikes a hard surface, it doesn't just ignite, it fractures in such a way that the tip of the penetrator remains sharp. Remember, its flammability doesn't matter much if the fires it starts are outside of the target's armor; it's when fire gets inside the tank that things get spicy.
True!