I use semolina as a filler in both my Rugers and the Rogers. Use just enough on top of the powder to bring the ball flush with the mouth of the cylinder. Several of us shoot in the Hendon postal comps, gallery rifle, long barrel revolver and black powder pistol. 13 shots with the best 10 shots counting for the black powder comp. One of our guys collects the shot cards and generally orginises it for us, Ta Charles.