Hornady vs Starline brass

[KMW1954]

Both cases are once fired and resized. A fired primer was then seated inverted to use as a plug. Was then filled with powder to overflow and then leveled off. So in this case the metric is grains of powder weight rather than using a fluid capacity.

I have tried doing fluid measure and just wasn't comfortable with the results.

Last sentence, "Starline has a slightly larger capacity." That being the Starline had a powder weight .3gr consistently greater than the Hornady brass of the same powder..