I've read through the whole thread.
@Brokennock has some options, but the one he chooses is entirely up to him.
Regarding historically correct lockbolts for a French
fusil, I browsed through Russel Bouchard's book,
The Fusil de Tulle in New France 1691-1741, looking for images of lock bolts. He shows the sideplate side of two Tulle
fusils de chasse on pages 23 and 25. Both
appear to show bolts with plain, dome-shaped heads, similar to the Tulle lock bolt offered by Track of the Wolf (
Lock Bolt, Tulle Fusil, 8-32 thread):
I don't know about French guns, but lot of original flintlock rifles had tapered tips on their ramrods. It is my understanding that the originals were made of heavy sheet stock, rolled into an elongated cone and brazed. People who make them now seem to turn them from solid stock, as far as I know. You can get tapered, threaded tips from Brad Emig (Cabin Crrek Muzzleloading), Larry Callahan, and Dave Crisalli (
The Lucky Bag). I think Dave may offer the most options, and I'll bet he may even be amenable to making a custom tip. His tapered tips in 5/16" diameter are 3" long, which should give maximum taper:
It sounds like the way to go might be to get a couple of the Tulle bolts from Track and a tapered tip from Dave Crisalli, and file the shallowest-possible notch in the bolt.
Best regards,
Notchy Bob