I would think alittle light oil. But i am new to muzzleloader hunting. In all my guns i clean them then run alittle oil down the barrel. Not alot but just get it wet. I have had a few people say well that will foul the barrel. Sure just dumbing a bottle of oil will do that. Maybe it is because my first real target gun was a AR15 but they liked the oil. I could have the oil running out the cracks and get 2 inch groups as 100 yards with iron sights. My plan is clean it lube it then run a dry patch down it. But i also plan on using solvent inplace of Rubbing alchol or water. IT may cost more but i do not want to be dumbing water down the barrel of a triumph. Not that o think it is wrong i just do not trust my self to get it all out.