RCBS takes bullet casting seriously. Their Bullet Moulds are expertly machined from solid cast iron blocks, crafted to strict tolerances to ensure consistent, clean and repeatable castings. The blocks are precisely ground square before machining, with steel alignment pins ensuring perfect mating of the mould blocks even after heavy use. Each mould block is equipped with a 3/16 inches thick solid steel sprue plate, tightly secured with tempered steel spring washers and screws for long-lasting durability. Available in a wide array of sizes and calibers, RCBS Bullet Moulds are perfect for casting bullets for a range of applications, whether for plinking, precision hunting or target shooting, ensuring you achieve reliable results every time.