Here are a couple of thoughts.
As mentioned, spit is very versatile. I can usually get through an entire match without wiping the bore.
Next, if this is an important match, I like to use Ol' Thunder Patch Lube and Bore Solvent. It is available through Smoke and Thunder Muzzleloading Supply. One year I won top shooter of the Coeur d'Alene Muzzleloaders. At the matches, I never wiped the bore between shots.
When I was shooting big bore rifles, I used, for example, on my 12 bore, after the powder charge, I put down a 12 gauge pre-lubed cushion wad, then a .715 round ball in a .015 Ox Yoke Wonder Lubed Patch. This was mainly a hunting load, but one time I did shoot it on a trail walk with 200 grains of GOEX Ffg powder. I think the match was about 25 shots, IIRC. I never wiped the bore and the last shot loaded as easily as the first. I believe I came in 3rd on the match.
I have used many brands of barrels over the years, from stock factory barrels, to Douglas to Sharron, to Oregon, to Rayle and even a few others that I just don't recall who made them. I have never polished them with steel wool or Scotch Brite pads and I have never worked on the muzzle. Maybe I am lucky, maybe I am blessed, or whatever. And I have certainly done my share of winning over the years. Or maybe I just expect the barrels to function the way I want them to and they do. I dunno.
John (Bigsmoke)