Re: Need Powder Measurement Help
Powder grains are a weight measurement. However, people are not going to carry sensitive scales into the woods, so volume measurement is used. However, different powder actually have slightly different densities. So triple seven is measured by volume, in equivalent black powder volume but weighs less than black powder, (as does Pyroduh)
What you meassure in your brasss measure is probably not 100 grains or 80 grains. As long as it is consistent, accuracy can be had. I used the same black powder measure for thirty years. I never cared what the actual "grains" were. But that it was the same each time.
if it bothers you, measure out a 100 grain volume and actually weigh it on a good electronic weight scale. Most such volume scales such as yours are "off" 20% is more than what I would have expected. Keep in mind that even different black powders have different densities. a 100 grain volume of Swiss will weigh different than Goex, or KIK.