I need some suggestions. I have my father's custom .54 percussion rifle and plan on deer hunting with it this year. It is firing .535 round balls with a patch beautifully. However, I would like to use the 535gr Parker conicals I have, but they just fall down the barrel. I made a cross-shaped patch and lubed it for the conical. It "worked", but I basically had to hammer it down. What would be some of your suggestions? Thanks