A few months ago I made several posts about the balls per pound bore measurement method. I wanted to take this step farther by asking how this ball is made. I told the NRA that I was interested in a time period of 18th and 19th century. The person would be a back woods gunsmith with little to NO formal education. The back woods gunsmiths would have limited measuring tools to work with. I was interested a 10 gauge or 10 ball barrel. I think the gunsmith would not be able to calculate the bore diameter but would use a chart supplied by the master gunsmith during the gunsmith's apprenticeship. The return letter was very interesting and I am attaching a copy with my personal information blacked out. I had seen barrels made at the gunsmith shop in Colonial Williamsburg using a mandrel and forge welding. The bore was enlarged using reamers. I think we can appreciate the precision in our modern guns. Like the letter said, it is a shot in the dark.
Enjoy
Enjoy