Hi, I've ordered some gas seals for reloading 12 gauge 7/8 Oz. Lee drive key slugs in Winchester Universal hulls. The base wads on these hulls are pretty tall, and I am concerned that if I seat the gas seal down to where the base wad ends, I might have some air space under it where the powder goes. Does anybody ever use some sort of filler over the powder to avoid this?
Scotty