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Oh boy, this subject is beyond a simple answer but this might be as close as it gets:Zippidydoodah wrote:What is the center of pressure and how does it affect stabilization, etc . How can you change center of pressure to improve the accuracy. Etc
from Dan Theodore's web page.The aerodynamic forces on the bullet as it flies from muzzle to target exert an overturning moment that can induce bullet wobble. This force is called the Center-of-Pressure. The Center-of-Pressure (CP) is the vector summation of aerodynamic forces acting on the bullet in flight. It is always in front of the Center-of-Gravity (CG) for a spin stabilized projectile. We really don’t need to know much about the CP except that the aerodynamic forces can be summed to act at a single point on the spin stabilized bullet in front of the CG and it will make the bullet wobble or tumble if not spun fast enough. Think of the distance between the CG and CP as a lever. The longer the lever the greater the force applied to making the bullet wobble. If the CP and CG acted at the same point the bullet would not tumble even if shot from a smooth bore. That type of bullet is commonly known as a “round ball.” Through bullet design we can work to shorten the distance between the CP and CG and improve bullet stability.