Strange behavior
As you can see from the video, the behavior of the bullet in the ice at first glance looks quite strange. Do not hit a thick layer of ice, the bullet continues to vibrate in the funnel. A closer look shows that the bullet quickly spinning around its axis, while maintaining momentum shot and melting the ice around them.
All is explained quite simply. Ice - is hard and slippery. Physical law states that in this case, the greater the pressure on the material, the thicker it becomes. The bullet, which is used in this case, the stopping action, but not penetrating, which quietly entered to ice. This pool during the shot is given strong rotation through a rifled barrel. In flight, the bullet "drills" the air around them, which is why very hot and hitting the target as it is screwed into the surface. Slippery ice surface, and rotation are not allowed to pass into the interior of the ice mass, and she is forced to spin like a top until until it stops.
via
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