Shot the trail one fall or spring with my .32 SMR. Prior to that day, I melted my tin of Track's Mink Oil and dipped all my precut patches in it.
Then squeezed them in a stack, to remove the excess.
The first load was the most difficult. After that, then went down with 2 fingers - .311" ball. .0235" patch. A .320 ball would just barely sit on the muzzle, so it was likely about .319" bore.
I also used a 10 ounce denim at .021" with a .320" ball. Loading did not need a short starter, but I use one, it's faster than pressing the patched ball into the muzzle.
The lands were wider than the grooves in this barrel.
I should note (forgot to) that the 56th shot that day, loaded easier than the first. No wiping at any time from the first yo the last shot that day or any day I shoot for that matter..