I have 2 different lots of 107 smk, and they measure different from base to ogive.
But I don't have to adjust my die any between the 2 lots because it sits them to the same Cartridge Base to bullet ogive measurement.
That suggests they all have the same ogive profile, and the distance between your CBTBO measurement bushing's contact point, and the seater stem's contact point, are consistent. What would be variable between the lots is the calculated net case capacity.
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Only thing I've ever seen is a gauge by which you can measure rim thickness.Ireload2, how do rimfire folks measure to sort their bullets?