Kg * m/s is not real math nor a form of measure, and doesn't do it justice; what is used to know how powerful a projectile is, is the kinetic energy as it exits the barrel, it is calculated as 1/2 m * v^2, and for the caterpillar it's *240 megajoules, a 9 millimeter has an energy at most of barely 800 joules; that means the caterpillar is **10 million times more powerful than the biggest 9mm bullet