Lee has a reputation for manufacturing quality reloading products, such as the Lee Hollow Base Rifle Mould - Single Cavity .459" 405 grain. This mould is rust resistant because of the aluminum material used but also designed to heat up and cool down much more quickly than seen with moulds constructed from steel and iron.Typically after just a few casts, an individual can produce excellent bullets thanks to it being CNC machined. There is also less fatigue on the bullet caster, and weights are provided along with recommended alloy, although they can vary.