The Redding #20 Bullet Seating Micrometer (MPN: 09080) is a drop-in replacement assembly designed to upgrade standard Redding seating dies to micrometer-adjustable operation. Machined from high-grade alloy steel with hand-finished adjustment surfaces and laser-engraved markings, it replaces the factory seating plug to provide direct-reading seating depth control. This allows reloaders to precisely adjust and log cartridge overall length or base-to-ogive dimensions in exact 0.001-inch (0.0254 mm) increments, eliminating trial-and-error adjustments when switching projectile types or tuning bullet jump.

Key Features

• Direct-Reading Micrometer: Features laser-engraved graduations marked in 0.001-inch increments for repeatable seating depth adjustments.
• Direct-Replacement Design: Installs into compatible Redding seating dies via a 1/2"-20 TPI thread interface without requiring a complete competition die set.
• Standard Ogive Profile: Houses an internal #20 seating plug profile engineered for conventional soft point, flat-base, polymer-tipped hunting bullets, and standard hollow-point match projectiles.
• Repeatable Indexing: Enables precise recording and dialing of seating depths across multiple projectile recipes for .30-calibre bottleneck rifle cartridges.

Specifications

• Manufacturer Part Number (MPN): 09080
• Thread Interface: 1/2"-20 TPI
• Adjustment Increment: 0.001-inch (0.0254 mm)
• Seating Plug Number: #20 (Standard Bullet Profile)
• Material: Machined alloy steel with laser-engraved graduations
• Cartridge Compatibility: .30-calibre bottleneck rifle cartridges including .308 Winchester, .30-06 Springfield, .300 WSM, .300 Win Mag, .300 H&H, .30-30 Winchester, .30-40 Krag, .300 RUM/SAUM, select 8mm, and 7.62x54R

Who is the Redding #20 Bullet Seating Micrometer - 308, 30-06 for?

• Precision handloaders tuning .308 Winchester and .30-06 Springfield cartridges — Provides direct-reading 0.001-inch depth graduations via a #20 seating plug profile to precisely set and repeat bullet jump for hunting and target shooting loads.
• Reloaders seeking to upgrade standard Redding seating dies — Converts standard dies using a 1/2"-20 TPI interface into precision micrometer-adjustable bullet seating units without purchasing a standalone competition die set.

Less suitable for: Handloaders loading extreme Very Low Drag (VLD) or long-secant ogive projectiles, which require a dedicated VLD profile seating micrometer to prevent tip deformation; reloaders using non-Redding dies (such as 1/2"-20 incompatible threads) or integrated Redding Competition Seating dies with internal floating sleeves, which require complete brand-specific or integrated competition seating assemblies.