Hello recently picked up a rifle made by Ferriss I believe to be about 1855. Target globe front lollipop rear. Outside was a little rusty but somehow the bore looked pretty good. Currently shooting .375 round ball, .018 patch over a felt wad and 30grns pryodex RS. Pyrodex is about all I have found available and it prints reasonably well at 30 yards Anybody have one or any info ?