ldholton,
Measuring CHE doesn't work UNLESS you have a pressure-tested load to compare it to, using exactly the same brass. I've run several experiments on this in a commercial piezo-electronic lab, and brass varies so much in thickness and the exact composition that anybody who claims X amount of expansion means Y PSI doesn't know what they're talking about, much less whether the load is "safe."
A chronograph is a far better indicator than CHE.
That's kind of what I was thinking. no real control suspect to start from
To be clear, my point about checking CHE is that if the solid web of the case is expanding, the load is too hot. Not talking about the pressure ring, ahead of the web, which does expand and get resized by a FL sizer die. The cause might be one of several things; it could be soft brass. I use it more as a double check, while also looking at the chrono results.
