sized. Then the shooter would certainly be knocked  off his feet by recoil, which would accelerate him by over 6 mph per  milligram of projectile fired. The power source would require about  40 gigawatts per milligram of projectile launched per second; and  all this energy would then be released as heat, which would equal  the explosive power of about 10 tons of TNT for each milligram of  projectile. Further, great damage would be done behind the target:  since no material is strong enough to slow a projectile appreciably  from such speeds over a short distance, much of the projectile and  debris would push through with practically undiminished speed. The  actual physics shows that being struck with one of these ammunition  rounds would send the victim into orbit around the earth. Also the  recoil from the weapon would tear the arms from the torso cleanly.