Reference them all. I'm not a Barnes guy but everyone says their data is usually either spot on or dang close. I like Hodgdons website for quick references, but I primarily use H extreme powders. I'm sure there is someone that will chime in with some actual data for you, but as a rule of thumb establish a safe starting point and work up slow. Do some research on how to recognize pressure signs and how temperature affects it as well. If you feel excessive recoil or your bolt is sticky to open up, stop right there and plan on backing that charge off. Good luck, welcome to the rabbit hole!!