What are the vertical lines near the nose of the Custom Competition bullets?

The vertical lines you may be seeing on the ogive of Custom Competition bullets are called lube fractures. They are caused by a forming lubricant in the dies, when forced at extreme pressure it flows between the copper jacket and the carbide forming dies creating those vertical lines. They are normal for cup-and-core bullet construction, and will not cause any change in ballistic coefficient, accuracy or general performance.

Tags: CC, Custom Competition, Vertical Lines
Last update:
2016-08-26 00:23
John Bullet
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