Just to comapre: a 9mm and a 7.62 NATO exert around 500 and 3000 joules respectively. A person can survive absorbing all the kinetic enegy of those rounds, as what kills in a bullet is the fine tip which creates tremendous pressure, but even then, the range of trauma may range from rib fracture to organ rupture and internal bleeding. And Ido's Kzichball exerts 500 000 joules.