I may be way off base here, but I thought factory crimp dies were cannelure crimps.
Frankly, I wouldn't do that on an a straight walled auto case. Taper crimp in a separate operation is the way to go, cannelure or not.
Besides which, I've never seen a bullet for .45 ACP with a cannelure.
[This message has been edited by sensop (edited March 13, 2000).]