What calibres are compatible with the Hornady Zip Spindle Kit - Standard SKU 043400?

This standard kit is designed specifically for Hornady Custom Grade and Match Grade New Dimension full-length bottleneck rifle sizing dies for .22 calibre and larger. It is incompatible with .17 to .20 calibre rifle dies which require SKU 043401, as well as straight-wall and handgun cartridges which require SKU 043402.

How do I correctly set the depth of the decapping pin during initial setup?

Hornady factory manuals dictate that the decapping pin must be adjusted to protrude exactly 3/16 inch, or approximately 4.76 mm, below the bottom opening of the sizing die. Exceeding this exact extension height significantly increases the risk of bending the spindle or shearing the decap pin under high press ram pressure.

Does this kit include the elliptical expander ball and retainer nut from my existing die?

No, this kit does not include the calibre-specific elliptical expander ball or the expander and decap retainer nut. Reloaders must transfer these necessary components directly from their existing Hornady sizing die body during assembly.

Does the Hornady Zip Spindle Kit require any electrical compliance or licensing to purchase in Australia?

As a purely mechanical reloading tool accessory, it contains no electrical components and does not require 240V mains power, SAA, or RCM certification. Additionally, it requires no standard firearms licensing to purchase and possess in Australia.

Reloading Zip Spindle - Hornady 043400

The Hornady Zip Spindle Kit - Standard (SKU: 043400) replaces friction-style sizing die spindles to eliminate slippage and provide rapid, precise vertical adjustment. Engineered specifically for Hornady Custom Grade and Match Grade New Dimension full-length bottleneck rifle sizing dies, this steel replacement assembly features a series of light threads cut directly into both the spindle stem and the collet lock. This positive-locking design prevents the spindle from slipping upward under ram pressure while allowing reloaders to either slide ("zip") the shaft for coarse positioning or turn it along the threads for incremental depth adjustments. The kit includes the threaded spindle shaft, a matching collet lock nut, and three standard headed decapping pins.

Key Features

Positive No-Slip Locking: Matched thread patterns on the spindle shaft and collet nut create a mechanical lock when tightened, preventing decapping rod slippage common to traditional friction collets.
Dual-Action Adjustment: Allows rapid coarse vertical positioning by sliding the loosened shaft freely, as well as fine, micro-threaded depth changes by rotating the spindle.
Factory Spare Decapping Pins: Ships with three standard headed decapping pins (Part #390222) to quickly replace sheared or bent components during high-volume sizing runs.
Die Retrofit Capability: Directly updates legacy pre-2006 Hornady smooth-stem rifle sizing dies to modern threaded Zip Spindle specifications.

Specifications

Product Model: Hornady Zip Spindle Kit – Standard (SKU: 043400)
Components Included: 1 × Threaded Zip Spindle shaft (#398567), 1 × Threaded collet/lock nut (#398731), 3 × Headed standard decapping pins (#390222)
Material: Steel construction with a silver finish
Weight: Approximately 0.05–0.09 kg (0.1–0.2 lbs)
Die Compatibility: Hornady Custom Grade and Match Grade full-length bottleneck rifle sizing dies
Calibre Envelope: .22 calibre and larger bottleneck rifle cartridges
Installation Setup Threshold: Decapping pin must extend exactly 3/16 inch (~4.76 mm) below the bottom opening of the die
Hardware Requirement: Calibre-specific expander ball and decap retainer nut are not included; user transfers these from the existing die body

Who is the Hornady Zip Spindle Kit - Standard for?

Reloaders servicing pre-2006 Hornady bottleneck rifle dies — Modernises legacy sizing dies by replacing original smooth friction spindles with a threaded replacement spindle assembly designed for bottleneck rifle cartridges of .22 calibre and larger.
Reloaders replacing damaged sizing hardware — Restores damaged die setups with a replacement spindle that positions replacement pins to the factory-specified 3/16 inch (~4.76 mm) extension below the die base to prevent pin shear and spindle bending under ram pressure.

Less suitable for: Rifle calibres smaller than .22 calibre measuring .17 to .20 calibre (which require a small-diameter sub-calibre spindle kit), straight-wall and handgun cases (which require a straight-wall/pistol spindle assembly with dedicated retainer hardware), or third-party sizing dies with non-Hornady internal thread patterns.

SKU	HN42501LP
Model #	043400
Brand	Hornady
Shipping Weight	1.0000kg

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Hornady 043400 Zip Spindle Kit Standard Reloading Tool

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