The Redding #23 Bullet Seating Micrometer (Model: 09083) is a direct drop-in replacement part designed to convert standard Redding bottleneck seating dies into precision micrometer-adjustable dies. Machined with standard 1/2"-20 threads, it directly replaces the factory non-micrometer seating plug, enabling handloaders to adjust Cartridge Overall Length (OAL) and bullet seating depth in exact 0.001-inch increments. This adjustment mechanism operates independently of the die body position and crimp ring, allowing precise bullet jump changes without altering press setup. The standard #23 internal seat plug profile is shaped for conventional ogive and spitzer projectile geometries across popular .22-calibre bottleneck rifle cartridges.

Key Features

• Direct Drop-In Upgrade: Replaces standard 1/2"-20 threaded seating stems on existing standard Redding seating dies without requiring an entirely new die set.
• Precision Micrometer Scale: Features laser-engraved micrometer graduations that allow repeatable bullet seating depth adjustments in 0.001-inch (or smaller) increments.
• Independent OAL Tuning: Alters bullet seating depth and overall length without moving the die body or disturbing existing crimp ring settings.
• Standard Plug Geometry: Machined with a standard nose profile to fit traditional spitzer and tangent-ogive .22-calibre bullets.
• Completely Mechanical: Manual operation requiring zero batteries or electrical power for benchtop reloading.

Specifications

• Manufacturer Part Number: 09083
• Thread Interface: 1/2"-20 standard seating plug threads
• Adjustment Increments: 0.001-inch scale graduations
• Plug Type: Standard #23 internal profile
• Cartridge Compatibility: .223 Remington, .223 Remington Ackley Improved 40°, .22-250 Remington, .22-250 Remington Ackley Improved 40°, .220 Swift, .222 Remington Magnum, .22 BR Remington, .22 Nosler, .22 Savage HP (5.6x52R), .225 Winchester, .219 Zipper, and .219 Donaldson Wasp
• Die Body Requirements: Standard Redding bottleneck seating dies with 1/2"-20 top threads

Who is the Redding #23 Bullet Seating Micrometer - 223, 22-250 for?

• Precision handloaders shooting .223 Remington and .22-250 Remington — requires direct 0.001-inch micrometer adjustments to dial in precise seating depth on standard 1/2"-20 threaded dies when switching between different bullet weights and profiles.
• Benchrest and target shooters tuning cartridge overall length — benefits from a reloading seating die micrometer that provides engraved 0.001-inch graduations to fine-tune bullet jump without altering the locked die body or crimp ring settings.

Less suitable for: Reloaders using dedicated Competition Seating Dies or large-format Z Series dies utilizing 5/8"-18 threads, which require integrated micrometer assemblies or 5/8"-18 specific seating stems, as well as handloaders seating long-secant Very Low Drag (VLD) projectiles who require a specialized VLD profile seating stem to prevent meplat contact.