I’m shooting a Lyman GPR flintlock in 54 cal. Shooting .530 roundball with mink oil lubed .018 pillow ticking patch. I got good groups at 75 yards with 80 grains 2f Goex, but when I tried 90 (and 85), my groups opened up. My last two bull elk were shot at 90 yards with the same gun but percussion with 90 grains of 2f triple 7. My question is if 80 grains of 2f Goex is enough punch for elk out to 100 yards in the flintlock? My option is to switch to 3f Goex (which I have) and stay at 80 grain (more velocity for 3f) or even bump up a bit. I could try a different ball/patch combo with the 90 grains of 2f, or try going to 100 grains, but I felt my fouling was increasing with 90 gr of 2f. What ya think?