This is incorrect, and what trips most people up about volume.
They weigh it for a VMD calculation, which is a reference point only and not a goal of the load. Volume is measured in CC's, mL's or another volume measurement. They pressure test each lot, take a VMD calculation and load. Extruded powder has a very tight BR to BD control. A consistent case fill is what they are after. If the BD changes there is a corresponding inverse relationship with the BR. So if there is more nitro(power) then the burn rate slows down; with the inverse also being true. In this way the powder will always produce a consistent pressure. The weight may or may not change much, but the case fill is always the same.
Bookmarks