What reloading presses and thread pitch are compatible with the Lyman LY-4590 3 Die Set?

This die set features a standard 7/8"-14 thread pitch, making it fully compatible with virtually all standard single-stage and turret reloading presses from major brands like RCBS, Redding, Lee, Hornady, and Lyman. It is engineered specifically for manual batch processing on single-stage or turret setups, rather than high-volume progressive presses.

Does this die set come with a shellholder or do I need to purchase one separately?

The Lyman 3 Die Set .45-90 WCF does not include a shellholder, which must be acquired separately. You will need a calibre-compatible shellholder, such as the Lyman #17, to properly secure your .45-90 WCF brass into your reloading press.

How does the included M-Die help when reloading cast lead bullets for vintage black powder rifles?

The die set includes Lyman's signature two-step neck expanding M-Die, which is ideal for black powder cartridge rifle (BPCR) and antique firearm competitors. Step 1 expands the neck to uniform inside tension just under bullet diameter, while Step 2 slightly flares the mouth to prevent shaving lead or jacket material from delicate flat-base cast projectiles.

Are there any specific Australian electrical or regulatory certifications required for this product?

As the Lyman LY-4590 is a completely mechanical handloading tool containing no electronics, regulations such as 240V mains power and SAA or RCM electrical certifications do not apply. However, because these are standard polished steel dies rather than carbide, case lubrication is required during full-length sizing, and light oiling is recommended to prevent rust during humid Australian storage conditions.

45-90 Die Set - Lyman LY-4590

The Lyman Classic Rifle 3-Die Set for .45-90 WCF (MPN: 7460499) provides the essential tooling required to resize, expand, and seat straight-walled and mild-taper .45-90 rifle brass. Machined from heat-treated steel, this three-die configuration is designed for manual, precision batch reloading on standard single-stage or turret reloading presses. It features industry-standard 7/8"-14 thread pitch and includes Lyman's two-step neck expanding "M" die, which prepares brass mouths specifically to prevent the shaving of delicate lead or jacketed projectiles during the seating process.

Key Features

Full-Length Sizing Die: Returns fired brass to factory dimensions while depriming spent cases via a one-piece decapping stem. Polished steel construction requires standard case lubrication.
Two-Step "M" Neck Expanding Die: Features a stepped expander plug that first sets the neck to uniform inside tension just under projectile diameter, followed by a slight mouth flare to protect flat-base cast lead bullets.
Bullet Seating Die: Accurately seats .458" to .459" nominal diameter projectiles to the specified cartridge overall length (COAL) with a built-in roll crimp capability.
Universal Press Interface: Features standard 7/8"-14 threads to mount securely in standard single-stage and turret reloading presses.
Storage Packaging: Ships in a dedicated moulded plastic storage box, with the complete set weighing approximately 1.7 to 1.88 lbs (0.77 to 0.85 kg).

Product Specifications

Calibre: .45-90 WCF (also suitable for .45-90 Sharps / .45-85 WCF; 2.4-inch nominal case length)
Die Type: 3-Die Rifle Set (Full-Length Sizer, "M" Neck Expander, Bullet Seater with Roll Crimp)
Thread Pitch: Standard 7/8"-14
Material: Precision-machined, heat-treated steel
Supported Projectile Diameter: .458" to .459" (cast lead and jacketed)
Shipping / Unit Weight: 1.7 to 1.88 lbs (~0.77 to 0.85 kg)
Shellholder Required: Calibre-compatible shellholder (such as Lyman #17, sold separately)

Who is the Lyman 3 Die Set 45/90 for?

Black Powder Cartridge Rifle discipline competitors — provides full-length case sizing and stepped neck expansion designed specifically to reload nominal 2.4-inch .45-90 WCF cases for vintage single-shot platforms using standard 7/8"-14 threaded reloading rifle die sets.
Handloaders loading cast lead bullets for vintage lever-action and single-shot rifles — uses a dedicated two-step "M" expander die within this rifle die set to flare the brass mouth, seating .458" to .459" diameter cast projectiles without shaving lead.
SSAA antique and classic firearm competitors — delivers dedicated three-die batch processing tailored to .45-90 WCF chamberings, packaging heat-treated steel sizing and crimping tools in a complete kit weighing 1.7 to 1.88 lbs.

Less suitable for: High-output reloading operations exceeding hundreds of rounds per hour or cartridges with case dimensions other than nominal 2.4-inch .45-90 brass (such as .45-70 or .45-100); high-volume progressive die sets on dedicated commercial progressive presses or calibre-specific standard dies matched to alternate case lengths are better suited to those applications.

SKU	LY39892LP
Model #	LY-4590
Brand	Lyman
Shipping Weight	0.6000kg

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Lyman Ly-4590 3 Die Set 45-90 Wcf Steel 7-8-14 Thread

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