375 H&H- how does it feel?

[JMP]

Randall, what are the units of measure that you refer to in the case weighing scenario. I get that you weigh the mass, but the case capacity is a volume. So you normalize for the mass of water and get volume. cc/ml/mg I forget the easy math . . . . .. . . thanks . . . .

Flouncer
You measure the case capacity in grains of water.

Yep, it's grains of H2O. The International System of units was set up to make sense and used H2O as a benchmark with ease of calculation.
1 mL H2O=1 cc H2O=1 gram H2O
But, we use grains and not grams so some of the transparency is lost.
Also, using water and a syringe is going to be one of the more accurate ways of measuring case volume.