Suggestion; add some small amount of graphite to a pound jug of propellant/powder, and gently agitate it until it's quite likely the graphite is fully distributed.
I have, for years, been convinced that Moly is redundant as a bullet/bore dry lube coating, as graphite has already been a key kernel coating component for at least the past century (it's there as an electrical conductor tasked with preventing static electrical buildup which would be disastrous if static discharges became prevalent in propellants during handling/transportation).
IMHO, it's just another dry lube otherwise. When added to the propellant, it becomes part of the bore fouling, providing an accumulated bore coating. IMHO, the 'carbon fouling' that is normally present is coming from the kernel coatings; adding more graphite to the propellant simply provides a more dense bore coating, similar to what moly additives are doing. I suspect that using graphite instead of moly lube allows the dry lube to be more easily removed from the bore with conventional powder fouling solvents than would be feasible when using moly.
I suggest adding it to the propellant since that was suggested some time back as a less complicated means for incorporating moly into the reloading process.
It could also be mixed into an alcohol suspension for conditioning a clean bore, and the addition of a few drops of gun oil to the suspension might make the graphite coating more persistent prior to firing. One might easily substitute acetone for alcohol, too; but that might be undesirable if it causes problems with gun coatings.
The point is that the solvent should evaporate, leaving a uniform graphite bore coating behind.
Finally, the bore conditioner (minus the oil) might work as an internal case neck coating, and I would brush the neck interiors clean first.
No oil because I wouldn't want petroleum compounds near the propellant inside the cartridge.
Greg