Yes, but from the same batch, reloaded at the same time, their volume would still be uniform charge to charge. That would only vary the weight of the charge very slightly, especially in the lighter loads.
True, but I'm not much into re-tweaking the load with every new batch to account for mass density differences. Volumetric charging doesn't inherently have this batch-to-batch variation. Of course I'm being a little facetious, but the claim that energy density is more consistently correlated with mass than volume may be fundamentally flawed due to the chemical nature of smokeless powder.
