The Hornady Custom Grade New Dimension Neck Sizing Die (model 046041) is a mechanical reloading tool engineered to resize only the case neck of bottleneck rifle cartridges while leaving the fire-formed body and shoulder dimensions undisturbed. Constructed from precision-machined hardened steel, it threads into standard 7/8"-14 reloading presses. By preserving the fire-formed dimensions of cases fired in a matched chamber, this die maintains headspace, enhances bullet-to-bore alignment, and minimises brass work-hardening to extend usable case life for 6mm, .243, and .244 calibre platforms.

Key Features

• Targeted Neck Sizing: Resizes exclusively the neck area of fire-formed cartridge brass without contacting the case body or altering the shoulder datum.
• Zip Spindle™ System: Utilises light-pitch threads on the decapping spindle and collet for micro-incremental height adjustments or quick sliding along the threads without slippage.
• Elliptical Expander: Incorporates a polished elliptical expander design that smoothly expands the internal neck diameter on the press downstroke to reduce friction, neck stretch, and shoulder pulling.
• Sure-Loc™ Lock Ring: Features an exterior split-clamp lock ring that secures settings to the standard 7/8"-14 threads without stripping or marring the die body.
• Machined Internal Profile: Finished with a smooth, precision-machined internal surface to reduce operating friction and prevent brass galling during repeated sizing cycles.

Specifications

• Product Model: 046041
• Calibre Compatibility: 6mm / .243 / .244 calibre bottleneck rifle cartridges (including .243 Winchester, 6mm Remington, 6mm Creedmoor, 6mm-284, and .240 Weatherby Magnum)
• Press Thread Interface: Standard 7/8"-14 mechanical reloading press thread
• Material: Precision-machined hardened steel
• Power Requirements: Non-powered manual workshop accessory

Who is the Hornady 6mm Cal. Neck Sizing Die for?

• Bolt-action rifle handloaders — achieves cartridge concentricity by maintaining exact chamber fire-forming across 6mm calibre cases using standard 7/8"-14 thread reloading presses.
• Competitive precision rifle shooters — minimises friction and shoulder movement when reloading 6mm Creedmoor or .243 Winchester match brass using this neck sizing die with an elliptical expander to preserve neck alignment.
• Bolt-action hunters — extends brass case life across .243 calibre bottleneck cases by eliminating repetitive body sizing and excessive brass work-hardening on fire-formed cases.

Less suitable for: Semi-automatic, pump-action, or lever-action rifle cartridges that lack the camming leverage of a bolt action, cartridges swapped between multiple rifles of the same calibre, or fire-formed brass demonstrating chambering resistance or tight bolt closure after multiple firings; these conditions require a full-length sizing die or dedicated body die to restore factory body and shoulder clearances.