I shoot a smoothbore .62 caliber. I load 80 grains of Goex 3f an over the powder card, then a fiber wad, the ball, and finally two over the shot cards. Accuracy is exceptional until you get around 40 yards. After that the very tight group it will shoot opens up to 6 inches and bigger. I shot once at 75 yards and could not keep them on a 8 X 11 sheet of standard paper.....

They are a lot of fun to shoot without doubt. And when that .600 diameter 324 grain ball thumps down range there is a lot of energy there....