Why is the bullet made to rotate when fired?

Answer 1

several of these answers are right but ill give it to you in a nut shell:
bullet are designed to turn with the spiral grooving in side the barrel that is known as rifling this you may know then makes the bullet more stable and accurate similar to how gyroscopes, and tops spin to become stable/ stranght

Answer 2

Bullet designs have to solve two primary problems. They must first form a seal with the gun's bore. The worse the seal, the more gas generated by the rapid combustion of the propellant charge leaks past the bullet reducing the efficiency. The bullet must also engage the rifling without damaging the gun's bore. Bullets must have a surface which will form this seal without causing excessive friction. What happens to a bullet inside the bore is termed internal ballistics. A bullet must also be consistent with the next bullet so that shots may be fired accurately.

Once it leaves the barrel, it is governed by external ballistics. Here, the bullet's shape is important for aerodynamics, as is the rotation imparted by the rifling. Rotational forces stabilize the bullet gyroscopically as well as aerodynamically. Any asymetry in the bullet is largely cancelled as it spins. With smooth-bore firearms, a spherical shape was optimum because no matter how it was oriented, it presented a uniform front. These unstable bullets tumbled erratically, but the aerodynamic shape changed little giving moderate accuracy. Generally, bullet shapes are a compromise between aerodynamics, interior ballistics necessities, and terminal ballistics requirements. Another method of stabilization is for the center of mass of the bullet to be as far forward as practical as in the minnie ball or the shuttlecock. This allows the bullet to fly front-forward by means of aerodynamics.

Answer 3

Because the barrel of the weapon is "rifled," which means it has spiral grooves inside the barrel to make the bullet spin. This spinning is what makes the bullet go in a straight line and improves accuracy of aim. If you think about it, rifling equalizes the explosive forces around the bullet and cancels them out. Thus, the only propulsive force is coming from behind the shot, and the bullet therefore can't help but go in a straight line As opposed to old style muskets that had limited accuracy because their barrels were not rifled. Thus the shots would go off in unpredictable patterns. Make sense?

Answer 4

Sad but truth. To make bigger damage, to be more effective in killing and hurting.
Bullet does damage to human tissue in two different ways, by mechanical force (piercing it) and by blast wave. Mechanical force is responsible for getting bullet through tissue - rotating makes it easier and it makes bigger damage because its way of moving is spiral not linear.
The other thing is blast wave. When fast, moving projectile pass through tissue, it leaves wound that is much wider than it would be created only with piercing tissue. Blast wave (and because of that wound too) is even wider when projectile is moving spiral, not linear. That is also why are we creating faster and faster projectiles (bullets). They leave deeper and bigger wound.

Answer 5

This way, when spinning in the air, bullet maintains it's direction and is therefore more accurate.

It's the same reason why artificial satellites rotate.

Answer 6

Same theory as throwing a tight spiral with a football. It travels in a straight line and at a higher speed.

Answer 7

Angular momentum is the key to bullets flying straighter.

Answer 8

centrifugal force