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Seeing a faint line near the case head of some of my brass. I stuck a bent paperclip down inside and didn’t feel any difference from unfurled virgin brass.
Ya, the shoulders are taking a beating for some reason. Looks normal, the line is probably from your last resizing efforts. Most of mine look similar prior to cleaning/polishing but very faint after tumbling.
I'm not that OCD....but alas I don't have time to chat more today...I gotta go sand the burrs off the rims of my 308's and 5.56's where they hit concrete.
I'm not that OCD....but alas I don't have time to chat more today...I gotta go sand the burrs off the rims of my 308's and 5.56's where they hit concrete.
Seeing a faint line near the case head of some of my brass. I stuck a bent paperclip down inside and didn’t feel any difference from unfurled virgin brass.
Well if you didn't feel ANYTHING, then it's not likely any kind of case head separation issue. Though the more distinct a case head separation line looks the more you can feel it with a paperclip (I too use a paperclip to determine the state of case head separation). To me your pic doesn't quite look like it either as the line seem kinda low and might be where your sizing die ends its sizing process. Any brass I've had that had case head separation occurring had lines higher than that. . . . like this:
Take a caliper and measure above and below that line. Does the left pc have the same amount of firings on it? I think that line is the back end of your chamber.
Seeing a faint line near the case head of some of my brass. I stuck a bent paperclip down inside and didn’t feel any difference from unfurled virgin brass.
I feel like that is from your die. I would also ask if possibly you use the Sinclair Concentricity Gauge. It leaves a ring right around head separation area from the bearing balls that it rotates on when checking TIR. But both of these items ring out a fair distance below where head separation occurs.