This might be more appropos to "Handloading".
An XXgrain bullet MIGHT be appropriate but you need to obtain loading data from the supplier of your bullets: Speer, Hornady, Sierra, etc.
At least a half-dozen MAJOR factors affect component selection. Without knowing bullet weight, style, manufacturer, cartridge overall length, primer, brass source, etc, you cannot decide upon a safe charge weight. With a 1:9 twist, I'd suggest at least a 62-grain bullet but 68 to 80 grain weights are likely best.
I "grew up" using Speer manuals. They have a thorough "how to" section right up front that will point you in the right direction. Learn and consider those other variables before choosing your projectile and powder.