That's very close to what I'm trying to say.
The basic idea is that you can fiddle forever with the minor sources of variation, and not make progress. If you have sources of variation in your process that are much larger than the variation in a powder measure, then the effect of variation in the powder measure will be much smaller than most people expect because of the peculiar way that random variation adds.
Early on, I was individually hand weighing charges. Then I took the time to characterize my scale and my powder measure, and have not weighed charges ever since.
With ball powder, the variation of my powder measure is comparable with the variation of my scale (and with stick not much worse). I can trust one as well as I can trust the other. In my system, the powder measure is not the main source of variation, and not what I need to be working on if I want more consistency.
Last edited by denton; 05/03/20.
