T/C's circa 92' Handbook lists a 103 gr. Maxi-Ball using 30gr. of FFFG as optimum for performance and accuracy,,
It also lists 50 gr. of FFFG as "Max Load-Do Not Exceed" for the same projectile.
The trouble you may have with the Wad-cutter style projectile vrs. Maxi-ball style is a lubrication issue. The maxi are generally grooved for acceptance of a grease type lube,, where as the wc is generally shorter and desire full contact with bore and rifling and may perform differently.
Just don't fall victim to "need more powder""max-load syndrome"
Good luck