Have you tried that without the olive oil? In both my Shaprs and the muzzleloaders, any time I try using olive oil, I get fouling problems. An animal oil works much better, such as mink oil, or marmot oil, or bear's oil.

The animal oil from around the vitals is what's needed. It's oil content is extremely high, compared to the high solids content in the outside body fat.

Must be some fat little critter around where you live who'd like to donate for a test? Use low heat when 'trying' out the oil so you don't burn it.

O'course, with smokeless powder loads, simply using LBT lubes is an easier road to success.