[WESHOOT2]

I stop when my chrono tells me the charge weight/velocity relationship goes awry.
Then I back off.

Then I try it again, with some small variation in the load to get another read.
And again.

Etc., trade secrets, personal, private, old data, in my cluttered head..........

IN YOUR GUN you can also make case measurements to provide you with the specific expansion from your chamber. Use new sized cases for these tests.

There's more..........