It's lead. Historically lead or leather was used to pad the flint in the jaws of the hammer, which was called the "cock" at that time. If a person uses lead to pad the flint there is a good chance of springing the jaws on the hammer, so modern shooters use leather for the most part. The color of your flint makes me think that it's French. English flints were very dark, and I've seen amber colored French flints. The French military used a .69 caliber flintlock musket called a "Charlyville." The English used the .75 caliber "Brown Bess" musket. The flints for various firearms varied in size, with the flints for the Brown Bess being huge. I've heard guys call them "tombstone flints," perhaps over an inch wide. The Charlyville flints would be a bit smaller, maybe 7/8's inch. .79 caliber is the same bore as a 12 gauge shotgun, and that bore size relates to the size of a round lead ball that it would shoot. In other words, the .75 caliber "Brown Bess" musket fired a ball that weighed 12 balls to the pound. .58 caliber is a very common caliber in the later fur trade era, that that is 32 balls to the pound, or a round ball that weighs 1/2 ounce. Without looking it up, I recollect that the .69 caliber is 20 guage or so, a 5/8" ball weighing 20 balls to the pound.
![leadsculpture[1].webp](/data/attachments/335/335885-bfaafd5d3d314b9ec43fd09ac44fb427.jpg?hash=nRoasWO532)
![leadsculpture[1].webp](/data/attachments/335/335899-bfaafd5d3d314b9ec43fd09ac44fb427.jpg?hash=nRoasWO532)
