Bob, on Hanshi' s recommendation year's ago, I tried Cotton duck. I buy it at Jo Ann's. Worked better than any other patching material I've tried (a lot of different materials) in ALL of my rifles.
Loads easy and shoots tight groups with a super tight weave. Tough as nails. Never a bad used patch recovered even out of a rifle or two I have that are known to obliterate other materials.
Just my two cents, and worth both pennies.
Best regards, Skychief.