Newbold's OptiDrill Dummy Rounds are ideal for malfunction drills, diagnosing shooting problems, gun handling drills, classroom work, loading and reloading drills. These totally inert, highly visible rounds are an effective and safe way to master your firearm handling skills. Newbold OptiDrill Dummy Rounds are perfect for training applications when live ammunition isn't an option. Each round is made using a solid brass case for maximum durability and has a solid polymer primer to protect your firing pin when dry firing.