I've been using the Hodgdon load data. I might try the Sierra data and see what it chronos at.

Boydy - I previously tried stepped loads, abouit the same results for the 40gr.
COl 40gr - 1.736" 1st batch, 1.750" 2nd. batch (no apprechiabl difference); 45gr - 1.760"
https://www.dropbox.com/s/p69tpohz7y...20001.jpg?dl=0