Spinning ice bullets

Rifling: When a bullet is fired from a gun, it travels through a barrel that has spiral grooves called rifling. These grooves impart a spin to the bullet as it exits the barrel. This spin stabilizes the bullet's flight path and improves accuracy.
* Conservation of Angular Momentum: Once the bullet is spinning, it tends to maintain that spin due to the principle of conservation of angular momentum. This means that even after the bullet hits the ice and slows down, it will continue to spin.