"Lead does not give, or bounce, and it doesn't let a flint bounce when it hits the frizzen. Lead holds the flint firmly in the jaws of the ****, and provides weight to drive the flint into the frizzen and down in a scraping action to cut and throw very hot steel bits into the priming pan. If the lock is tuned properly, the angle of the **** to the frizzen will be correct and the flint will not only scrape steel from the frizzen in one continuous stroke, but will be self-knapping. That is, it will make a new edge every time the gun is fired. There will be no need to knap the flint, as it will not clog its edge with steel."
yep just like i said, i have had much better luck with lead wrapped flints.