The prior owner of the gun worked up a load using #9 TSS shot, which I have continued to use.
I am aware of the implications of using TSS.
At this point, I shoot only the shots I take on game. The load is established and if I don’t shoot at game I can pull the charge and save the shot.
That said, the load used is 100gr of 2F under 1-5/8oz of #9 TSS. I weigh the shot charge on my metallic reloading scale to the grain. The powder I measure by volume.
I shot a few shots to get acquainted and get a pattern established and it puts well over 200 pellets in a 10” circle at 25 yards, and 165-185 pellets in a 10” circle at 40 yards. Distribution is very even.
With the barrel being jugged, I can still shoot round balls in that same gun, which I do. I took a doe with it this past January, actually.
My round ball load is a 648 ball, 016 patch/mink oil, and 90gr 2F. It shoots under 3” at 50 yards.
Overall, quite pleased with this gun.