Land Owner, the guy at the other end of the firing line had the most reaction. He commented it didn't sound right and I probably needed to check the bore for an obstruction. The new arrivals just kinda looked over my way. The barrel had a good bit of powder laying in it (H450, a slow ball type). The bullet cleared the barrel. I punched the bore with a dry patch, wiped out the chamber, and chambered a fired round before resuming firing.