Played hookey from school to get to the range today...
Here's what 80 grains of out-0f focus FFG black powder looks like in a horn measure...
The flask ain't period correct, but its safe and easy to use.
Pour it down, seat a fiber wad on top, and then, 1 1/2 oz of out of focus 7 1/2 shot....
Poured out of that period-correct shot bag. Seat shot card on top.
Prime with 4 grains FFFFG...
...and at thirty yards ya get this (gotta go to 200% to see the pattern, scale is in inches)
Birdwatcher