T/C 1000 is for lubing conicals and patches for roundball. Some people use it to protect their rifles from rusting after use. I like a more modern approach with a quality gun oil in that department, but that is an entire new discussion.

My favorite breech plug lube is CVA Breech Plug and Nipple Grease. A little trick even though I have never seemed to have any problems with my Knight rifle is after about seven to ten shots just take and twist the breech plug back and fourth to make sure it is not seizing.