Originally Posted by
megasupermagnum
You may use any 1 1/8 ounce shot data for these in-wad ball loads. If that pictured wad is a fired wad, I'm thinking your fit in the bore is too loose. I know it is often said on this site that only a gentle push through the bore is ideal. In my experience, wad slugs shoot better the tighter you can get them. It is a very thin line between tight and ruined wad (which ruins accuracy). This is one of the reason I do not like wad slugs. Some of my best shooting loads when measured with wad and slug together were almost .010" over bore diameter, and were very tough to push through by hand.
If you can push that through by hand through a modified choke, you are certainly too loose of a fit. Try the Lee .690" ball.