Sabot Slug, Bore Rider Slug, Rifled Slug, 12 gauge 50 yard Range Target Test! 7/8 slug used was the lee key drive. Searching, Developing Practical Slug Combinations That Work. Please contribute your ideas for mods and or designs. elvis ammoGuns and gear.  Ammunition, cast lead bullets, powder coating bullets, reloading, reloading equipment, Science and reviews!