Why Does Rifling Improve Accuracy?

Rifling imparts spin to the bullet along the latter's lengthwise axis. This helps the bullet maintain a stable trajectory when it leaves the gun and enhances both the range and target accuracy of the gun. That's the short answer.

Why does rifling make a gun more accurate?

Rifling refers to the spiral grooves that are cut into the internal surface of a gun barrel. Rifling helps impart a spinning motion to a bullet when it's fired. A spinning bullet is much more stable in its trajectory, and is therefore more accurate than a bullet that doesn't spin.

Does rifling improve accuracy?

The spin imparted by rifling significantly improves the stability of the projectile, improving both range and accuracy. Typically rifling is a constant rate down the barrel, usually measured by the length of travel required to produce a single turn.