Can we just go back to posting #6. Can you confirm that the first picture shows a case that fits your chamber?
And the third picture shows a case that doesn't?
If that is the case the last picture shows a case with the shoulder 7thou too far fwd.
Your are adjusting your die to contact the shellholder and the screwing down maybe 1/3 more are you to take out linkage slop etc?
Don't get too hung up on overall case length. You normally have leeway with that and published lengths have a safety margine set in them. Each rifle can be different.
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