Taylor shot a match with his .40, Kuntz flinter, using 1F. He'd grabbed the wrong horn at rendezvous. It worked quite fine, although he needed to up his powder charge considerably to
make it shoot to the sights. Fortunately for us, it took him some time to realize that, which gave us a 'fighting' chance to beat him. I do not (quite) remember the results of that match, however.
So - will it work in a .54 or .58 smoothie? It "worked" in a .40 calibre flintlock rifle, does that answer the question?