I have a new to me TC Hawken flintlock in 54 caliber. I have Goex FFg and FFFg propellant powders, and FFFFg powder for priming. I also have .535 diameter 230 gr round balls. Barrel length is 28”. Can someone share their preferred charge for whitetails? Previous owner used 90grs of FFg. My Lyman manual shows charges from 40-120gr. Suggestions please. As far as I know this is 1-48 twist. Thanks.