The Hornady Custom Grade Handgun Expander Die (.45 Caliber / .451) is a dedicated handloading tool designed to expand the internal case mouth diameter and create a uniform flare on straight-wall .45 calibre brass. This belling step ensures jacketed projectiles start straight and seat cleanly without shaving copper or damaging bullet bases. Built with industry-standard 7/8"-14 threads and precision-machined internal surfaces, it installs into standard single-stage and progressive reloading presses to prepare cases for consistent bullet seating across common .45 calibre handgun chamberings.

Key Features

• Consistent Mouth Expansion: Expands straight-wall .45 cases and applies a slight bell to facilitate aligned bullet entry and smooth powder funnel operation.
• Multi-Cartridge Compatibility: Services straight-wall handgun cartridges including .45 Auto (ACP), .45 Auto Rim (AR), .45 Winchester Magnum, .45 Long Colt, and .454 Casull.
• Polished Internal Surfaces: Machined to reduce friction against case mouths, minimising brass resistance during the press stroke.
• Adjustable Depth: Uses a standard knurled locking ring to precisely control expander entry depth and the exact degree of case belling.
• Press Compatibility: Utilises 7/8"-14 threading to fit conventional reloading presses with mechanical stroke cycles.

Specifications

• Manufacturer Part Number (MPN): 044556
• Thread Interface: 7/8"-14 threads
• Intended Calibre: .45 calibre straight-wall handgun brass
• Nominal Bullet Diameter: .451"
• Tool Weight: Approximately 0.227 kg
• Package Dimensions: 146 mm (L) × 38 mm (W) × 38 mm (H)
• Compatible Cartridges: .45 ACP, .45 Auto Rim, .45 Win Mag, .45 Long Colt, .454 Casull

Who is the Hornady 45 Cal. Expander Die For 45 Auto (Acp), 45 Ar, 45 Win Mag, 45 Long Colt, 454 Casull for?

• Straight-wall .45 calibre handgun reloaders — Mounts via standard 7/8"-14 threads to expand and flare straight-wall cases specifically sized for nominal .451" jacketed bullets across .45 ACP, .45 AR, .45 Win Mag, .45 Long Colt, and .454 Casull chamberings.
• Bench-mounted press operators — Adds a single-case expanding station to 7/8"-14 thread single-stage or progressive presses, delivering a complete steel expander die weighing 0.227 kg to streamline projectile seating without shaving material.

Less suitable for: Handloaders processing bottleneck rifle cartridges, or those seating oversized cast lead bullets exceeding nominal .451" dimensions (such as .452" to .454" projectiles); these applications require a dedicated rifle sizing die with an internal expander ball or a specialised larger-diameter lead bullet expander die.