How does a rifled barrel of a weapon makes a weapon much more accurate?

Question

How does a rifled barrel of a weapon makes a weapon much more accurate?

In: Engineering

Answer 1

To add to the spin part, watch someone throw a football without spin. The ball will wobble in mid air unpredictably.
It’s the same principle with a bullet, except the higher velocity results in loss of accuracy.
Spin is achieved by fine grooves in the barrel, the longer the barrel the more time is has to spin up.