I remember reading that some guys add something over their (blank) powder charges to make a big muzzle flash. Is it flour, or corn meal or something else. I'd love the recipe. On the 4th we usually shoot my 1" bored naval gun. This year I tried pouring a 1/4 cup of flour over the powder (300 gr Fg. with a thin piece of newspaper to separate them, and then my normal newspaper stuffing over that. We got the boom and smoke all right, but no big fireball like I was hoping for. Anyone got any suggestions?