Thanks to all. I am trying to get a full 3/4 oz. of hard nickel plated #8 shot into a WW .410 HS hull, and it looks like the only way to do it is to eliminate the petaled shot cup, and just use the base part of the wad without the petals. I can get about .72 oz. in, using the red WW wad, but even it has the top third of the load exposed to the bore, above the wad petals. I may load a few without any petals just to see how much it will hold, and how they pattern. I've got a feeling I won't like the patterns, but we'll see.
The WW 3/4 oz. .410 loads have a full 3/4 oz. in them, but it is not plated shot, so weighs a little more. Therein should be the difference between the .75 oz. in them and the .72 in mine.
The reason for wanting the full 3/4 oz. is that one of my S x S guns is regulated only with a 3/4 oz. load at about 1100 fps. I'm trying to duplicate that with hard nickeled shot.
SRH
