I was using 60 gr (vol) of by209 and a 240 xtp for my nephew. Unfortunately had a hang fire when it counted (at a deer) and we didn’t connect. Too light a load for bh209? I think I would use 777 or pyrodex if shooting that light a load in the future. Someone used to post about shooting light charges (~50gr 777) with the all lead tc cheap shots with acceptable results on deer.

My old Rossi .45 youth muzzleloader manual suggested one pellet under a 195 gr Barnes, iirc.

I use 50 gr of pyro P in my white whitetail with a 460 gr NE all lead bullet. Subsonic with enough punch out to 100 yards for deer.