Nope, I never have used a wonder wad for my round ball loads. I know that I can still get an honest 1.75" center to center at 50 yds with 80 grs RS and the round ball. The others, the best I can do so far is 3" or so. I have some of those round ball targets still. I figured there was not need to have a wonder wad if I can get less than 2" at 50!!