Why Do Bullets Have Cannelure?
In Modern Bullets, Such as the 7.62 Illustrated Here, the Cannelure Is Pressed into the Circumference of the Bullet to Provide a Strong Purchase for the Mouth...
In modern bullets, such as the 7.62 illustrated here, the cannelure is pressed into the circumference of the bullet to provide a strong purchase for the mouth of the cartridge case when it is crimped onto the cannelure. This is done to prevent the bullet from moving either forward or backward in the case.
Do you have to crimp bullets with cannelure?
It must be clearly understood that a cannelure is essential to obtain good results with a roll crimp. Remember, bullets that do not have a cannelure but need to be crimped should be given a taper crimp. Taper crimping is the best choice for any firearm which headspaces on the case mouth.
What is meant by cannelure?
1 : a groove running lengthwise on the surface of a cylinder or column. 2a : a groove around the cylinder of an elongated bullet for small arms to contain a lubricant. b : a groove around a bullet into which the edge of the cartridge case is crimped.
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