Jim,
I have a flint D. Boyer match rifle. It's .48, 16 lbs. and has not been altered. Hand-made barrel with a perfect bore and it is a barn-burner. Very plain wood, no carving, no patch box...just a "get their money" gun. What is really nice...the gun still has it's original touch hole...no liner and not burned out. First match I took it to, it smashed a spider for the first shot, which was the fourth shot I fired out of the rifle. I've used it in three matches so far, and it has won them all.
General consensus, including Don King, is that the rifle is about 1820 vintage, but I think the barrel is earlier. The barrel does not show signs of being re-stocked or re-cut, so I don't know. Early-style wide lands and narrow grooves which did not excite me until I shot it. The rifle has been fit with an early-style long strap rear peep sight which is missing. The barrel is relieved for about an inch at the muzzle, about six-inches of choke and then a slow taper to the breech. Whoever did this knew what they were about.
Let me study on how to do photos and I'll see if I can post some...
Steve Garbe