Hi, I haven't yet tried French Amber Flints. Sounds like Spanish Fly?
I have tried a number of cut and knapped English Fints in my Pedersoli rifles:
My Traditions Trapper has fast ignition, the Petersoli rifles are dogs. I have tried different flints, enhances vent holes, different powder position and dogs of Pedersoli just go woof woof bang. One of the Pedersoli's has the vent hole high in the pan, the other low. Both remain dogs.
There isn't anything I can do wrong and not have the Traditions Trapper ignition fast. I did notice that the Trapper has a cutout at the bottom of the flashpan next to the vent liner, see:
The Pedersoli pans go straight to the edge of the barrel. Does the Trapper pan cutout make the difference? I don't know, but may try to dremel a cutout on one of the Pedersoli's after I test the new Traditions Prairie Hawken and see if it also has that pan cutout.
Regards,
Richard