Newton “The vis insita, or innate force of matter, is a power of resisting by which every body, as much as in it lies, endeavours to preserve its present state, whether it be of rest or of moving uniformly forward in a straight line”.
Once a give elements acceleration exceeds the proportional speed of the electrons ellipse around its nucleus (adjusted for linear time) it will reach a new demarcation between the speed of sound and the speed of light. The element will no longer behave like conventional matter due to compression stress at this velocity. It will in fact convert to the positron of what is currently know as “Dark Matter” in quantities that would take the largest collider hundreds of millions of years to produce. Mach 9.2 is the needed velocity of the projectile. As a railgun collider marriage is the likely genesis for such a project you could have a Rail that benignly passed through matter or annihilates itself and the matter. A rail that enters a collider at the impact box would atomized matter in a way that will open the door for a new age of weapons. The country that solves this first will have the option of world domination. We have no confidence that people who bet such projects understand the implications of such technology so in our view it will sit on the shelf for a while.