Advice about pressure signs

[Klem]

They both vary 9,000 to 20,000psi over and under actual pressure test breech readings. They aren’t consistently-under SAAMI MAP. That’s the problem.

You could take Hodgdon’s and Western Powder’s cumulative data and enter each combination into QL to compare against their measured pressure test breech numbers if you have a lot of time on your hands.

You will see numbers all over the map relative to the real-world numbers.

Which is why it is wise to consult multiple sources, and not just QL. And start 10% low.