I was about to make a run on some brass tonight when I noticed on the first few that the necks were exhibiting a scoring symptom.

Took apart the die and cleaned it, and looked inside with a flashlight to see if I could find any roughness, but everything looked fine.

The scoring has a very, very slight step leading to the case body, but running perpendicular it's noticeably ridged.

Has anyone seen anything like this before? Is it a problem or just a cosmetic issue?

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Die: Forster FL NM