What bullet diameters and case dimensions are supported by the Hornady 546370 7.7x58 Japanese Arisaka die set?

This 2-die set is engineered specifically for the 7.7x58mm Japanese Arisaka cartridge using .311" to .312" diameter projectiles. It features a standard 7/8"-14 thread pitch compatible with single-stage and turret presses, and uses a recommended trim-to length of 2.259 inches with a maximum case length ceiling of 2.269 inches.

Does the Hornady 546370 die set include a shell holder or do I need to purchase one separately?

The shell holder is not included in this die set and must be purchased separately. For optimal performance on your reloading bench, this die set uses a Hornady #1 Shellholder or #1 Shell Plate.

Are there any Australian electrical or SAA/RCM compliance certifications required for this Hornady die set?

No electrical compliance or SAA/RCM certifications are applicable to this product. The Hornady 546370 is a completely mechanical, unpowered handloading tool operated entirely by hand on your workshop bench.

What specific design features does this Hornady die set use to ensure consistent bullet concentricity?

The full-length sizer die incorporates Hornady's Zip Spindle design with an elliptical expander for smooth neck sizing without brass stretching. Additionally, the seating die features a floating bullet alignment sleeve and stem that pre-aligns the bullet and case neck before seating to minimize runout.

Arisaka Reloading Dies - Hornady 546370

The Hornady Custom Grade Series III 2-Die Set (Model 546370) is engineered for full-length resizing, spent primer decapping, and precision bullet seating for the 7.7x58mm Japanese Arisaka cartridge. Built from polished steel with standard 7/8"-14 threads, this mechanical reloading die set restores fired factory cases and reformed 8x57mm Mauser brass to precise factory dimensions. Operating with a floating bullet alignment system and an elliptical expander, the set ensures concentric case necks and consistent seating depths for .311" to .312" diameter projectiles without requiring mains power or electrical interfaces.

Key Features

Full-Length Sizing Die: Features an internal elliptical expander that delivers gradual neck expansion to reduce friction, eliminate brass stretching, and prevent neck pull-out during extraction.
Zip Spindle™ System: Utilises precision-machined incremental threads on the spindle and collet to eliminate slippage while enabling rapid adjustments and quick slide repositioning.
In-Line Seating Die: Employs a floating bullet alignment sleeve and steel seating stem to align the case neck and projectile perfectly before entry into the die body.
Sure-Loc Lock Rings: Includes Hornady Sure-Loc rings that clamp across the die threads to hold precise bench adjustments without marring the 7/8"-14 thread pitch.

Technical Specifications

Calibre: 7.7x58mm Japanese Arisaka
Die Thread Interface: Standard 7/8"-14 TPI
Compatible Bullet Diameters: .311" to .312"
Shellholder Compatibility: Hornady #1 Shellholder or #1 Shell Plate
Recommended Trim-To Length: 2.259 inches (57.38 mm)
Maximum Case Length Limit: 2.269 inches (57.63 mm)
Total Packaged Weight: Approximately 1.40 lbs (0.64 kg)
Included Components: Full-length sizing die (#046371), in-line seating die (#044114), Sure-Loc rings, plastic storage box

Who is the Hornady Custom Grade 7.7x58 Japanese Arisaka Die Set for?

Australian Military Surplus Collectors — Shooters maintaining Japanese Type 99 Arisaka service rifles who require a dedicated 7.7x58 Japanese Arisaka reload die set with standard 7/8"-14 threads to reliably form and reload obsolete military cases.
Scarce Cartridge Handloaders — Target reloaders looking to assemble accurate custom loads using .311" to .312" diameter hunting or match projectiles while maintaining a precise 2.259 inches (57.38 mm) trim-to length.

Less suitable for: Handloaders assembling cartridges for 6.5x50mm Arisaka, 7.7x56mmR (.303 British), or firearms requiring standard .308" diameter projectiles, which require dedicated calibre-specific sizing die sets or custom undersized expander spindles to ensure adequate case neck tension.

SKU	HN102075LP
Model #	546370
Brand	Hornady
Shipping Weight	0.1000kg

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Hornady 546370 Custom Die Set 7.7x58 Japanese Arisaka 2-Die

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