I am a firm believer in 2f in the .54 and the .58 calibers. Especially when shooting flintlock. Although the other day I shot off the little bit of 3f I had sitting around in my .50 caliber Lyman Great Plains Hunter. And when that was done, went immediately to the 2f and it shot better. One thing I found with the 3f is I seem to get more fouling in the barrel. Now you'd think it would the opposite and that 2f would be more dirty. But in my Lyman when swabbing, the pressure got tight right as I entered the bore VS half way down with the 2f.

Those are good groups. You also have to remember you shot a lot. And towards the end some of that could have been shooter fatigue. I find that when I sit out there all afternoon and bang away, towards the last I am just wasting ammo. I still have some of your .575 ball and I think I purchased a mold too. Then sold the GMB .58. There is no way that .575 is going down that Early Virginia.

Hell, I'd say that wasn't too bad of a shootin' session considering the nature of the beast you were trying to tame. Are you gonna attempt to lighten that trigger any Semi? The only thing I hate worse than a trigger that breaks hard is one with a lot of creep...

BPS

Yeah BPS, something has to be done with the trigger. It's not acceptable as is. I've already polished the contact surfaces. It helped a little but no where near enough. I see two possibilities. Either lighten the combination trigger guard/hammer spring in some way or filing down the sear notch a bit. I'm not sure which way to go. Both have hazards.

I do believe I'd work on the spring (or try and find a replacement) rather than filing the sear. You can always put the old spring back in but with the sear you'd have to replace the metal and reshape which would be a real PITA!