I just got in from shooting a few of the Federal Truballs and happened to find one of the little plastic balls in the backstop. It measured a hair over .440 inches. It got me to thinking with the gluelits that some people make why a homemade version of these couldn't be done. I already have an appropriate sized roundball mold. Anyone have one of the Lyman 20 gauge foster slug molds that they wouldn't mind sending me some of the slugs, or let me borrow the mold for a week or two?