Or you could just go to a better, more substantial patch and not add another step to loading.
Whatever you decide you need or works best for you.
Virtually every rifle I have, or have had in the past, shoots/shot amazingly well with a .005" undersized ball (smaller than bore dia.)
and a 10 ounce denim patch. Some of them shot the very best, using a bore sized or slightly larger ball and the same 10 ounce denim patch.
As a test, Taylor & I tested a .508" round ball and 10 ounce denim patch in his favourite offhand rifle, his Virginia .50 with Rice bl. He loaded that
with short starter (of course) and the rifle's tapered hickory rod. This rifle does have .016" deep, rounded rifling. Normally, he uses a .495" ball and
the same patch material.
My old calipers used to measure 10ounce denim at .0225", but the new ones, must have narrower jaws and measure this material at .021".(compressed)