DF,
I take every thing with a grain of salt! Especially if the info comes from a party that has something to gain from it. Add to that the lack of consistant methodology in measurement and most numbers are suspect. I chose the same source hoping the methodology would be consistant. When I measure volume I like to use a fired case and fill it full of deoxygenated water to a level forming a convex meniscus. That's the prefered method for Quickload data. I have some 26Nosler brass but alas no rifle to fire it in.
SCP