I don't know if I've started paying more attention to my brass or if my collet die has changed. I'm sizing .223 brass, where the neck meets the shoulder I'm seeing a ring indention. Is this something the collet die leaves on the neck or not ? I've noticed on the older brass that has been fired several time's the indention is more evident and deeper into the neck. Like I've said I don't know if I'm looking and paying more attention to the brass or not. Just wondering if this is normal, seems everthing happen's on a weekend when the manufacturer's are closed.