RCBS Bullet Moulds are expertly machined from solid cast iron blocks to exacting tolerances, ensuring precise, clean and repeatable castings with every drop. At RCBS, we take bullet casting seriously, meticulously grinding all mould blocks square before machining for the highest possible quality. To guarantee long-lasting accuracy, we use steel alignment pins, ensuring perfect block alignment even after years of heavy use. Each mould is equipped with a 3/16 inches thick solid steel sprue plate, securely fastened with tempered steel spring washers and screws for durability. Mould handles are sold separately, allowing you to customize your setup for optimal comfort and control.