We can learn a thing or two from the black powder cartridge shooters about packing powder. To them consistancy in packing is very important and is affected by the amount of powder you put in the shell and the depth you seat the bullet. Same holds for a front-end loader except we make our shells one at a time and the barrel is the shell. I've seen target shooters loading with the butt on a bathroom scale. They push on the ramrod until the scale reads about 40#. You can also buy a neat little tool that does the same thing. It is attached to the ramrod and has a let-off at a certain prescribed weight. (Kind of like a torque wrench, but in linear rather than circular dimension). Kadooty something or other was one of these tools.
I believe the important thing is black powder performs best under some amount of packing, but not too much. And, consistancy in packing will result in potentially smaller groups at the target. I would expect the amount of packing for optimum performance would vary from one brand to another. I've no clue about pyrodex, but the pelleted form would surely reduce that varriable.
I do know that packing smokeless powder is not as critical as packing black powder, and that's due to the speed of ignition.
Now you've got my curiosity sparked, I may have to find out from some manufacturers like Goex and Elephant Brand what they reccomend. Maybe some reader already knows. HAPPY 4th to all.
Horse Dr.