Hornady Custom Grade New Dimension Series III Die Set .303 British .312"

The Hornady Custom Grade New Dimension Series III Die Set .303 British .312" is a precision reloading solution engineered for shooters and handloaders working with the .303 British cartridge—a historically significant round still favored by military rifle enthusiasts, hunters, and competitive reloaders. This two-die set addresses the specific needs of reloaders seeking repeatable accuracy and consistent case sizing for one of the less commonly supported cartridges in mass-market reloading ecosystems. Whether you're resurrecting a Lee-Enfield or maintaining a modern .303 rifle platform, this die set delivers the engineering precision required for reliable ammunition production.

Built to Hornady's Custom Grade standard, the New Dimension Series III dies incorporate articulated design geometry that enables fine-tuned adjustments, superior case alignment, and smoother functioning throughout the reloading cycle. The .312" sizing specification ensures correct neck and body diameter control for proper .303 British chambering, while the die set's machined construction minimizes tolerance drift over thousands of reloading cycles. The two-die configuration—typically consisting of a sizing die and seating die—provides the essential components needed for safe, accurate rifle ammunition assembly without unnecessary bulk or complexity.

This die set is ideal for dedicated reloaders maintaining legacy military rifles, custom .303 builds, or niche hunting platforms where commercial ammunition availability is limited or cost-prohibitive. The compact footprint (5.4 x 2.9 x 7.8 inches, weighing 1.4 lbs) integrates seamlessly into any reloading press setup without requiring specialized mounting hardware or extensive bench modifications. Compatibility extends to all standard single-stage and progressive presses using standard 7/8"-14 TPI threads, making this set accessible to both beginner and experienced handloaders seeking precision ammunition for the distinguished .303 British cartridge.