Ok, I see your point, Zekewolf. However, a powder measure is a volumetric delivery system even though the volume of powder is accurately weighed to be sure it is the correct amount required.
I do contend that loading with a powder measure is indeed loading volumetrically, with the given that the cavity volume is first determined by the weight of the specific powder it holds. Thereafter, the volume of powder is the measure of each load (with an occasional weight check if necessary).
If every single charge were weighed before loading into a case, then your contention would be correct. In that case the powder measure is merely a powder dropper, a fairly accurate one to be sure, but the volume of powder is not the measure of the load, the weight is.
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