I have nothing but good things to say about JoAnn's #40 cotton drill. It shoots very well in all my pistols, from.54 to .32. Just as good in both my .54 rifles.
It is marginal in my .58 using .570 balls, it doesn't hold up with heavy loads. Same with my .61, it doesn't hold up to 85 grain loads of 2f, and that is the lower load.
By the way if you go to JoAnn's tell them you are looking for utility cloth, that's where they keep it.