Short Action Customs - Modular Sizing Die - 284 Shehane

2026-02-15T17:31:43-07:00

Vendor: Short Action Customs
Type: Reloading
Price: 484.99

The new Modular Sizing Dies are used for a family of cartridges. The Modular Sizing Die 284 Shehane works with rifles chambered with a standard reamer. Your caliber selection will dictate which decapping pin you receive with your die.

Modular Sizing Die 284 Shehane is intended for chambers reamed with a standard reamer.

The Modular sizes more at the base and less at the shoulder compared to traditional resizing dies

Made from 17-4 H1150 Stainless steel that is then nitrided to obtain the utmost lubricity

Made in the USA

For questions about reamer compatibility, email us at info@shortactioncustoms.com.

The “Modular Sizing Die” uniquely sizes the cartridge’s body geometry with the die body, while a “Neck / Shoulder Bushing” handles the shoulder and neck geometry. This allows one die body to work for the entire cartridge family.

Our Modular Sizing Dies focus on properly sizing your fired brass. These dies size the cartridge base slightly more than the shoulder, enhancing performance.

After studying precision CNC machines and tooling, we designed the Modular Sizing Die to center and secure the Solid Decapping Pin with shallow tapers rather than threads. This tapered geometry provides unmatched concentricity and repeatability.

We designed the cartridge sizing geometry to size slightly more at the base and slightly less at the shoulder compared to most resizing dies. For properly sized rifle chambers, this helps avoid extraction issues with fired brass and reduces case runout by minimizing over-sizing of the shoulder.

Modular Sizing Die Assembly

Modular Sizing Die Body: Standard 7/8 x 14 threads, 17-4 Stainless Steel, with a Salt Bath Nitride finish for increased lubricity and performance.

Universal Solid Decapping Pin: High-strength 1144 Stress Proof Steel, with a .058” pin tip diameter to fit small primer flash holes. Adjust the pin tip protrusion by positioning the wide-mouth retaining clip.

Knurled ER11 Top Cap: ¾ x 24 Threads secure the Knurled ER11 Top Cap to the die body, compressing the ER11 collet to ensure the utmost concentricity for the Decapping Pin or Expander Mandrel.

ER11 Collet: A commercially available ER11 collet secures various Decapping Pin and Expander Mandrel diameters.

Taper Adapter: The Taper Adapter, seated above the Neck/Shoulder Sizing Bushing, holds the ER11 Collet and allows the Neck/Shoulder Sizing Bushing to float.

Neck/Shoulder Bushings: Available in various caliber-specific neck diameters. You can add .001” shims above the Neck/Shoulder Bushing to adjust headspace without threading the die in or out