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.
We use cookies to make your experience better. To comply with the new e-Privacy directive, we need to ask for your consent to set the cookies.
