Those muskets sound pretty nice. Few people in the U.S. can afford to shoot originals, as they are so expensive here. However, since shooting originals are the norm in Sweden, shoot well. :winking:
A lot of readers shoot brown bess muskets, but relatively few of us shoot originals, nor do we usually shoot paper, preferring to hunt, or to shoot metal silhouette type targets.
I have found that as a rule of thumb, the bore diameter minus the ball diameter, divided by two should give a place to begin choosing a patch thickness.
You may have to convert to metric, but two examples: .78 caliber-.740 ball=.040/2=.020 starting patch thickness. A .025-.030 patch will compact, providing a more accurate load, and still be pretty easy to start into the muzzle.
.780-.750=.030/2=.015 thick patch.
Again a .020-.025 thick patch would provide a tighter combination, and probably better accuracy.
For the 50 meter range, an 60-80 gr. charge of Swiss 1.5 F, or 50-80 gr. of FFG Swiss should provide good accuracy.
My best round ball load in my Petersoli brown bess, which has a bore diameter of .748, is 80 gr. FFG Goex, .715 ball with a .017 thick patch. I have taken a couple of deer and won several smootbore matches, shooting at metalic targets of various sizes, placed at ranges from 15 to 100 yards with this load.
J.D.