The Lyman Neck Sizer Die (Model: LY-ND4570) is a precision-engineered reloading tool designed specifically for .45 caliber classic rifle and black powder cartridges. Unlike standard full-length resizing dies that return the entire cartridge case to factory dimensions, this neck sizer die only resizes the neck of the case. By leaving the case body fireformed to the exact dimensions of your rifle's chamber, this die ensures a custom fit, improves bullet-to-bore alignment, and increases shot-to-shot consistency. It is fully compatible with historic calibres including .45-70 Government, .45-90, and .45-100.

Key Features:

• Preserves Fireformed Brass: By only resizing the case neck, the brass body retains the exact shape of your individual rifle's chamber, ensuring a snug and consistent fit for subsequent firings.
• Extends Case Life: Repeated full-length resizing works the brass excessively, leading to stretching and premature case head separation. Neck sizing reduces metal fatigue, allowing you to get more reloads out of expensive and hard-to-find .45-70 and .45-90 brass.
• Improves Accuracy: Fireformed cases align consistently with the rifle's bore, minimizing cartridge play inside the chamber and producing tighter, more consistent shot groups.
• Standard Threading: Built with the industry-standard 7/8"-14 thread, this die is fully compatible with almost all single-stage and turret reloading presses from major manufacturers.
• Complete Assembly: The die comes equipped with an integrated decapping rod and an expander button, ensuring proper spent primer removal and consistent neck tension for bullet seating.

Product Specifications:

• Brand: Lyman
• Model/SKU: LY-ND4570
• Thread Size: 7/8"-14
• Cartridge Compatibility: .45-70 Government, .45-90, .45-100
• Weight: Approximately 250 to 300 grams
• Length: Approximately 3.5 inches (8.89 cm)
• Outer Diameter: Standard 7/8 inch
• Power Source: Manual mechanical operation (no electrical components or Australian RCM/SAA certifications required)

Who It Is For:

The Lyman Neck Sizer Die is an essential tool for Australian classic rifle shooters, lever-action enthusiasts, and single-shot Black Powder Cartridge Rifle (BPCR) competitors. Because factory-loaded .45-70 and .45-90 ammunition can be expensive and difficult to source in Australia, reloading is a highly practical solution. This die is specifically designed for shooters who use the same brass in a single, dedicated rifle, allowing them to maximize both accuracy and the lifespan of their brass cases. Whether you are preparing for local Australian target competitions or hunting with a classic lever-action rifle, this neck sizing die provides the precision required for high-quality handloads.