Die for .458 Win. Mag. Cartridge Reloading by LEE
Lee 3-Die Set for Caliber .458 Winchester Magnum
This comprehensive three-die set, crafted from high-grade steel, is specifically engineered for precision reloading of .458 Winchester Magnum cartridges, ensuring optimal performance and reliability in both metallic and semi-metallic ammunition applications.
The kit includes the following essential dies:
Full-Length Sizing Die: This steel die is designed to fully resize the cartridge case, restoring it to factory specifications and removing the spent primer. Proper lubrication of the case is mandatory prior to resizing to prevent case sticking and to maintain the integrity of the brass during the recalibration process.
Expanding Die: This die carefully expands the case mouth to facilitate consistent powder charging. Reloaders can utilize this stage to introduce the propellant charge either manually, using a precision powder measure, or automatically with a compatible powder dispenser system, enhancing efficiency and repeatability in the reloading cycle.
Bullet Seating Die: Adjustable for precise bullet seating depth, this die allows the projectile to be seated to the desired depth within the case neck. It also initiates the case mouth crimp, securing the bullet firmly in place. Caution is advised during the crimping phase; excessive force can deform or damage the brass, compromising cartridge integrity and ballistic performance.
Additional components included:
Shell Holder: A robust shell holder designed to securely grip the .458 Winchester Magnum case during the reloading process, ensuring consistent alignment and safe operation within the press.
Powder Scoop: A specialized scoop for accurate and efficient handling of powder charges, facilitating clean and precise loading operations.
Reloading Data Sheet: A detailed load data sheet is provided, offering recommended powder types and charge weights. Note that this data does not include specifications for Spanish-manufactured powders, and reloaders should consult local resources for compatible propellants.
For optimal die performance and case longevity, it is imperative to apply a suitable case lubricant before the full-length sizing operation. This practice minimizes friction and prevents case deformation, ensuring consistent cartridge dimensions and safe reloading cycles.