I appreciate all the comments, thanks. This barrel and lock have been repurposed so much, who knows what they started out as. I should not have said I was making a bench copy. What I am doing is to make a rifle as close in appearance to the rifle as it is now, as I can what with making parts or modifying the closest match. The Muzzleloader Magazine article has drawings and photos of the rifle. "Rifle barrel shortened from original length". "Relocated and strengthened barrel lugs". In "The Rabbet", the lock mortice, is there a place for a hook at the front? Both photos of the lock interior do not show a hook at the front of the lock plate. (Do I really need a front lock bolt on this flintlock? I don't want to do the hook.)
Eric- I have thinned mainsprings before, and cut a groove in the diagonal barrel flat for a mainspring. And that is a small rammer. The rod pipe inside diameters are .520 front, .500 rear and, and the entry pipe is .500. The rod groove is 1/2 inch. The rod is 41" long, .470 at front and .32 at the rear.
Bob, thanks for your generous offer. Friend Carney Pace offered to help shape a Gunmaker's special, but I think the L&R900 is my best bet. I have a kind offer of one.
HighUintas- I have used a shim on a bolster before. That is a good suggestion. And with no half-cock notch in the tumbler, why double set triggers?
I called Ryan at Muzzleloader Builders Supply to ask if the L&R900 lock would work on this 1 1/4" barrel. He said the lock mainspring is now shaped differetly from earlier models, being wider where the top arm angled end turns up under the bolster. He said it would hit the barrel. He agreed there was enough bulk in the barrel to grind a clearance groove, or the upper arm could be slimmed at the bend.
If this stock was built with a 5 or 5.2" long flint lock in the early 1800's, what lock would that be? Were there such short locks? I do believe it was a flintlock due to the groove for the hammer stop at the top of the lock plate.
It is taking longer to figure how to build this rifle that to actually build it. I really appreciate all your comments.