I've been shooting a ROA since 1979, and the one I have right now since 1986.

25gr of Pyrodex P, then the ball or conical, then fill the remaining small space with E45 ahnd cream from Boots.

That's all I have ever done and it gets me 2" group at 20 yards, one handed, left or right.

Semolina is something I've never tried, but my wife has let me have a can of Ambrosia Creamed Rice to try.

Will that do?

tac