Those poly wads look good. I'm not sure if I need a wad at all but shooting a full bore conical with lube IMO they would protect the powder from contamination should the lube become liquid in the heat or a warm barrel. They would definitely be needed with the. .451" and .452" bullets I was shooting earlier. But these .454" ones are much tighter. The reason I went that size is my bore slug at .457"! Pretty big for a .45 cal muzzy. And I checked the slug diameter with a dial caliper and a micrometer and got the same reading.