Looks pretty good, but note the brown scorch marks running outwards from the middle in a few spots.
That is blow-by, while not hurting things yet at the lower pressures of the 90gr. charge, your .020" patch material might not hold up with heavier hunting loads. The .562" ball is really quite small for a .58.
I use a .562" in my .574" Musketoon with a 10 ounce denim patch - somewhat thicker than the .020" you noted. As well, my .580 SXS Kodiak with it's .008" rifling, did best with a .574" (over sized .570" mould) and the same 10 ounce denim patch. They showed absolutely no scorch marks and the patches would hold up for numerous shots - each!