Many people who enjoy reloading prefer the Lee Round Nose Pistol Mould - Double Cavity (Handles Included). Because of the construction this mould is made to last. The rust-resistant blocks are made with aluminum that heats up and cools down fast and is extremely lightweight especially when compared to iron or steel blocks so there is not as much fatigue on the bullet caster. In addition this particular mould has specially crimped block halves which helps in producing perfectly round and correct sized bullets even after just a few casts.