Built around Redding’s bushing-style neck sizing system, the Redding Type S Bushing Neck Die Set, .300 Win Mag for .300 Win Mag (Redding part no. 78153) lets a reloader size the neck alone and leave the rest of the case untouched. Reloaders reach for the Type S system when a standard full-length die oversizes the neck and works the brass harder than it needs to; here, the bushing does only the job the load calls for. The set is machined specifically to .300 Win Mag dimensions so every die in the box shares the same chamber geometry. It’s built for the precision handloader chasing consistent neck tension, round after round, from the Redding lineup of reloading dies.

Key Specifications

• Neck sizing is done with interchangeable bushings available in .001 inch increments, so tension on the case neck can be dialed to the exact amount a load needs.
• The decapping rod position is adjustable, letting the reloader size only part of the neck length instead of the full neck when partial sizing is preferred.
• The resizing bushing is self-centering on the case neck, which improves concentricity and helps reduce bullet runout in the finished round.
• A standard-size expander button ships on the decapping rod, useful for reloaders working with commercial brass as it comes from the factory.
• A decapping pin retainer is included, letting reloaders who sort or turn their .300 Win Mag case necks skip the expander button entirely.
• The set includes three dies — the Type S bushing neck sizing die, a body die, and a Redding Series A seating die — covering neck sizing, body sizing, and seating in one box.
• Like all Redding dies, the bodies use the industry-standard 7/8-14 thread, so the set drops into any standard single-stage or turret press.

Frequently Asked Questions

Does this die size the whole case or just the neck? The Type S bushing die sizes the neck only; the included body die handles full case-body sizing separately, so a .300 Win Mag handloader can control each independently.

Can I choose how much neck tension I get? Yes — the die accepts Redding’s interchangeable .001 inch sizing bushings, so tension is set to match the brass and the load rather than a one-size-fits-all expander.

Is a seating die included in this set? Yes, a Redding Series A seating die ships with the set, so the box covers neck sizing, body sizing, and bullet seating together.

Buy the Redding Type S Bushing Neck Die Set, .300 Win Mag

Order the Redding Type S Bushing Neck Die Set, .300 Win Mag from Redding through our reloading dies lineup and add real neck-tension control to your .300 Win Mag handloading bench. As a non-firearm accessory it ships direct with no FFL required — order it from our Lubbock, Texas gun shop for fast, insured shipping.