Come on Alberta Bigbore ! You know the answer to that question.
You seen the flatten primer ! Every different shell brand or powder or amount or bullet brand or style or even primer can change the pressure ,even how deep you seat the bullet makes a difference .
I think you posted this because you just did not have 4 test loads you were testing , but maybe you loaded 100 rounds and then you said f.u. c. k. what did I do !
