The Hornady Custom Grade New Dimension Bullet Seating Die (MPN: 044103) is an in-line reloading tool engineered to seat 0.243" (6mm) diameter projectiles into .243 Winchester and 6mm Remington cartridge cases. Constructed from heat-treated select steel with a polished interior finish, it fits standard reloading presses via an industry-standard 7/8"-14 thread pitch. The die utilises a floating, sliding alignment sleeve that captures the case neck, projectile, and seating stem simultaneously before the bullet enters the brass, reducing bullet runout and ensuring concentric seating for field and target ammunition.

Key Features

• In-Line Floating Alignment Sleeve: Holds the cartridge case neck, seating stem, and projectile in straight alignment prior to seating, minimising bullet runout.
• Adjustable Built-In Roll Crimp: Allows handloaders to apply a roll crimp by adjusting the die downward, or back the die off to seat match projectiles without crimping.
• Sure-Loc Lock Ring: Features wrench flats and a split-clamp design that locks over the 7/8"-14 threads to preserve exact depth settings without thread damage.
• Durable Steel Construction: Machined from heat-treated steel with a polished internal chamber finish to prevent case marring.

Product Specifications

• Model / MPN: 044103
• Calibre Compatibility: .243 Winchester, 6mm Remington
• Projectile Diameter: 0.243" (6mm)
• Thread Interface: Standard 7/8"-14 thread pitch
• Die Type: Bullet seating die (non-sizing)
• Material: Heat-treated select steel
• Packaging Dimensions: Approximately 140 mm × 110 mm × 45 mm
• Gross Weight: Approximately 250 g to 300 g (including storage case)
• Operating Requirements: Manual reloading press (no electrical power required)

Who is the Hornady Custom Grade 243/6mm Seating Die for?

• Handloaders loading .243 Winchester ammunition for varmint and deer hunting — pairs with any standard reloading press using an industry-standard 7/8"-14 thread pitch to seat 0.243" projectiles with low runout using its sliding internal sleeve.
• Handloaders loading 6mm Remington ammunition for target shooting and pest control — accommodates 6mm Remington brass cases to seat 0.243" (6mm) diameter projectiles using a floating alignment sleeve that holds the bullet and case neck concentric before seating begins.

Less suitable for: Handloaders seeking to resize fired brass cases or load larger calibres exceeding 0.243" (such as .257 or 6.5mm), which require a dedicated full-length sizing die or calibre-matched seating dies designed for larger bore diameters.