If this is a war-fighting tactical ninja assault weapon, don't worry about the brass until it gets too deep to navigate."it depends"
Please distinguish from these two scenarios - marks made during ejection or during brass processing? If the latter, something is seriously amiss.
Asking for clarification. Extraction/ejection issues are distinct from brass processing issues. Different root causes.Can't tell if you are asking out loud, or asking the OP for clarification.
My guess is these are AR pattern ejection marks, but the OP will chime in to say for sure. Like Cemetery21 said, this is not uncommon when the brass hits the edges of the lugs of the bbl extension. There is a debugging process for AR ejection issues, but at this point that would only be useful if the OP says the marks are from an AR in the first place.
These weren't shot by me, I picked up brass from a shop to reload. They were all in a big bag marked 556, im assuming they were shot from an ARThose don't look like "scratches" to me - more like "gouges". I wouldn't run them through my dies for fear of potentially scratching the die or depositing brass particles inside the die which will lead to scaring the die.
I'm not an AR guy but those imperfections look like something the rifle is creating during the ejection / extraction process. I see similar imperfections of discarded brass at the range presumably from the semi-auto AR guys.
The OP should provide info on the firearm used.