This is traditional and really, just good common sense. Now then, reloaders like to weigh everything and that's fine. If you want to make some premeasured charges by weight, It will work but takes more effort. A Calibrated Precision measured by "volume" is preferred. In practice, you will likely get one anyway.Starting with BP is loaded in grains by volume not mass like smokeless.
Starting with BP is loaded in grains by volume not mass like smokeless.