Hi Rick,
A few outcomes possible here, let's hope it is an interesting one.

Will keep you posted.
My Regards,
Norman.
Hi Michael,
This material was gathered form inside the barrel about 6.5cm in front of the touchhole so well down the barrel and not near the muzzle. There is a harder substance behind it and by the clunk of the ramrod it sounds like lead, whether a ball or a plug I don't know. I am in the process of making a tool to extract the 'lead' if indeed it is possible to get it out. Will let you know soon how I get on. Thanks for your continued interest.
My Regards,
Norman