What is what improves when a bullet spins as it is fired?

When a bullet spins as it is fired, it experiences a phenomenon known as gyroscopic stability. This stability is achieved by the bullet's rotation creating angular momentum, which helps to keep the bullet flying straight and true towards its intended target.

The spinning of the bullet also helps to stabilize its flight by minimizing the effects of factors such as wind resistance, air pressure, and gravity. This makes the bullet more accurate and increases its chances of hitting the intended target.

Additionally, spinning the bullet can also improve its aerodynamic efficiency by reducing drag and increasing its velocity. This allows the bullet to maintain its speed and trajectory over longer distances, making it more effective at longer ranges.

Overall, the spinning of a bullet as it is fired provides numerous benefits that improve its accuracy, stability, and overall performance.