Dave - Thanks but I was down in the man's room and I got her all figured out. I had to remove the trigger assembly. The bolt came out easily. Then I removed the nipple (it was blocked up tight). I had to make a tool to remove the breach plug which took some time but it works perfectly. The breech plug was nice and clean except for some slight burnishing on the face. But glad I took it out there was no teflon tape or grease on it. I would have benn in for some fun later after a shooting session.
Got her all cleaned up and back together with a new nipple.
I believe it is an MK83 model from the pictures. For an older rifle, it was pretty well taken care of and is in nice shape.
I am going to try and test the reliability of the #11 ignition system. If its not up to par, I may switch to a musket cap. In any event, because of the long distance from the cap to the powder, I will be using magnum caps exclusively.