Greetings My Good nativeshootist
For Trapdoros, Some folks advocate lightish loads of slow smokeless but I would most definitely want to
shoot BP loads with Lead bullets in your trapdoor.
you wrote:
> I thought it was a piece of brass that was left in there
The photos are not very clear but from your photos, I can't tell if there is any brass left in that chamber. If there is
brass left due to case separation that suggests that a possible overload was fired in your rifle.
At the very least it looks like a seriously good scrubbing of the chamber would be in order.
The next thing I would do is to see if there IS anything left in the chamber. A separated case mouth
(for instance)
can be carefully removed without scratching up the chamber... If there is anything in there
do not go poking about with an awl, a screwdriver or the like...
An inexpensive bore scope like these
https://www.amazon.com/Seesi-Endoscope-Waterproof-Inspection-Semi-Rigid/dp/B07PBF6DX5https://www.ebay.com/itm/361533300065?epid=16014700536the little mirrors provided in the first one help a lot.
borescopes like those could help determine what is actually in there.
If there isn't anything in there I would try to get a chamber casting.
yhs
prof marvel