I just bought a Lyman GPR in a 54 cal.

Would some of you guys that shoot a Lyman GPR (54) help me out with some basic info?

Like, what size ball you shoot? powder (FF or FFF)? Cap size...10 or 11? grains of powder (70, 80, 90)? patch thickness and lube recommendation?

Right now I'm casting my own balls, using a Lee mold, for a 44 Remington. They seem to be a tad bit larger than the 451s that are store bought. I'm wondering if this will hold true for round balls I cast for a 54 cal. rifle?

Thx!