Need the assistance of firearms experts

Is it possible to create a safe flintlock variant of the Springfield model 1865/66/73 "trapdoor" breech-loading rifle w/ 1780s level technology? Would it explode or just be ridiculously expensive? Or did the level of technical precision needed to create such a weapon simply not exist prior to the 19th century? (Without severe ASBs, like intervention by time traveler.)

In the same vein how far removed is something like the Sharps Rifle from the 1776 Ferguson Rifle? Would it be possible for some hybrid/derived 'in-between' model to be manufactured that would lead to the Sharps &/or "trapdoor" rifles being created early?

Thank you in advance for your help.
Roger Redux
 
AIUI it's mostly a matter of creating a proper interface to get the spark/ignition source in contact with the propellant; flintlocks basically have a port in the receiver rear for the spark to contact the powder charge. A setup like the Trapdoor could maaaybe work along those lines, but the issue then becomes how to create ammunition compatible with that ignition source without compromising reloadability. Maybe a paper cartridge like the Dreyse Needleguns use could work, but I think you'd have issues with ineffecient powder burnoff given how the point of contact between the round and ignition means is on the side of the paper sleeve.
 
Maybe a paper cartridge like the Dreyse Needleguns use could work, but I think you'd have issues with ineffecient powder burnoff given how the point of contact between the round and ignition means is on the side of the paper sleeve.
I was actually thinking of using cloth or paper cartridges that would be specially soaked &/or treated with something that would ensure a rapid burn-off (something akin to "flash paper" or gun cotton, but less likely to explode the rifle).
 
You mean like the Hall Rifle?

No firearms expert, but there was flintlock breechloading rifle put in production at the US Harper's Ferry Arsenal, the Model of 1819 Rifle.
 
No firearms expert, but there was flintlock breechloading rifle put in production at the US Harper's Ferry Arsenal, the Model of 1819 Rifle.
Thank you! This has potential, especially seeing as Mr. Hall is said to have developed most of the tools for mass producing the weapon himself.
What I'm really trying for is to have breech-loading rifles standard issue as soon as possible; without being too outrageous. The Hall Rifle definitely looks to be a more credible starting point than the Trapdoor Springfield. (but the Trapdoor is just so cool, I was hoping...)
 
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