Thread: 223 tight chambering?

Good spotting @blip. All the resized cases have this on them when I checked closer. I've also coloured the end of one of the reloads and it hasn't got any marks around the neck after being chambered.



One thing noted is a decent rub mark about 8mm up from the base of the case. Maybe the other markings are a bit of a red herring and the tightness is the diameter further back.