Last year I struggled with a .54 flintlock that had been very accurate, and which suddenly became very inaccurate. I solicited ideas here, and folks were helpful. I tried all kinds of solutions, including tearing the gun apart and smoothing out the barrel channel, lapping the bore, etc. And then today it started again. 100 grains of Swiss FFg had the patched round balls dead on at first and then increasingly hitting apart. Loaded 80 grains and bang, a dead center bullseye at 75 yards. 85 grains, ball landed right next to the other one. 90 grains and the ball was centered by two inches high above the bullseye, and that is where I left it. The deer antler powder measure has been re-marked and I am feeling a lot more confident about my shooting. The barrel is a Colerain gain twist, so that may have something to do with the lower powder charge. Most .54s need a good 100 grains to get them shooting right.
Anyhow, why didn't I think of this before?
Anyhow, why didn't I think of this before?