When I first started shooting a flintlock it was one of those C.V.A. Kentucky rifles from Jukar Spain. You know, with the two piece stock. The flints I used were cut from some white stone, (they were marketed as flint), and sometimes caused the rifle to go bang. Upon being educated I've used English flints. Black as the ace of spades. As they have always worked just fine for me I've never bothered experimenting with other types of flint. I see on TOTW they sell French flints. No real difference in price. Has anyone used them? How do they compare to the English? Or do they just quit after the first shot.