don't have pictures, but...
A Roll Crimp is a slight inward roll of the cartridge case into the crimp groove (cannelure) of a bullet. It can't be used on bullets without the groove.
A Taper Crimp just "tightens" the casing around the bullet -- essentially, it removes the slight belling that occurred with the expanding die to allow the bullet to smoothly enter the case.
(Ron -- you covered more ground! Semper Fi. --vic)
Last edited by vico512; 11-09-2010 at 04:37 PM.
Reason: Ron beat me to it!
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