Anyone that uses or recommends oil based products in a muzzle loader is wrong.
As any chemist, black powder is water based (yup made with water).
You add oil into burnt powder you WILL get sludge, your next rounds will get stuck, and you will not be having fun. Ive been going to rondies since the 70s, and every year I give the same cleaning class.
I use the Number 13 and Bore butter also. An over abundance of bore butter (made with tallow) with (A) cake the plug, turn brown, and if enough is in there, melt under firing and clog your priming hole. Been there, done that.
I clean my barrel, then wait a few days for it to get good and dry, then add a very light coat of bore butter.
TC 1000+ is the best stuff on earth of a black powder bar.
The rest is counter productive.