Your question begs another question.
Do you own or have access to a pressure test barrel and the software?
If your answer is no, then the answer to your question is moot.
It's pretty easy to do the math and get a ballpark on pressure. The problem is that even using all the exact components, including the transducer, you could swap test barrels and get different pressure.
Change the lot of powder, that'll change your pressure.
Change the ambient temperature, that'll change your pressure.
Change brand of brass, guess what? Yeah, that'll change pressure.
Shoot the ammo out of different rifles, that gives different pressure.
You'd be much better off if you just forgot all about the question and focus on things that matter.