A lot of hunters around here are using 777 pellets. I dont know anyone using any form of Pyrodex.
I dont use either. For me it is real black powder that works perfect in all ML or BH209 when a proper breech plug is available. BH209 is not a viable option with that traditions. That leaves 777 and while loose charges are adjusted in fine increments, the folks I know dont need that level of control. They like easy or they are BH209 in some other gun.
IMHO, two pellets is a more consistent than volume measuring loose powder. Consistency is important too. These guys generally don't even own a scale and if they do, simply choose pellets. I am kind of odd man out with my scale and tubes full of powder. Then my best buddy does just that with 209. Lots of different ways to get the same end result.