The Redding 58139 7mm-08 Remington Competition Neck Die Set is a precision three-die handloading system engineered specifically for 7mm-08 Remington cartridges utilising .284 in diameter bullets. Designed for bench-mounted reloading presses featuring standard 7/8"-14 threading, this set provides precise control over neck tension, case concentricity, and bullet seating depth. The kit consists of a Competition Bushing Neck Sizing Die (Part #56139), a dedicated Body Die (Part #75139), and a Competition Bullet Seating Die (Part #55139), delivering match-grade accuracy for fire-formed brass.

Key Features

• Top-Mounted Micrometers: Both the neck sizing and bullet seating dies incorporate precision micrometers calibrated in fine 0.001" increments to establish repeatable neck sizing position and bullet seating depth.
• Internal Alignment Sleeves: Sliding internal sleeves support and align the cartridge case prior to sizing and seating operations, significantly reducing bullet and case neck runout.
• Interchangeable Bushing System: Supports standard Redding neck sizing bushings typically ranging from 0.305" to 0.313" (sold separately), allowing handloaders to precisely set neck tension without overworking brass necks.
• Shoulder Bump Body Die: Includes an independent body die designed to resize the case body and bump shoulder geometry back into specification without contacting or altering the case neck.

Specifications

• Calibre Compatibility: 7mm-08 Remington (.284 in diameter bullets)
• Mounting Interface: Standard 7/8"-14 thread pitch
• Die Set Composition: 3-die set (Competition Bushing Neck Die, Body Die, Competition Seating Die)
• Adjustment Resolution: 0.001" micrometer increments
• Bushing Range Compatibility: 0.305" to 0.313"
• Recommended Shellholder: Redding Shellholder #1 (Part #11001) or Competition Shellholder Set #1 (Part #11601)
• Packaged Weight: Approximately 0.7 kg to 0.9 kg (1.5 lbs to 2.0 lbs)

Who is the Redding 58139 7mm-08 Remington Competition Neck Die Set for?

• 7mm-08 Remington bolt-action target shooters — requires precise 0.001" micrometer adjustments on the neck sizing and seating dies alongside Redding bushings between 0.305" and 0.313" to eliminate runout and dial in consistent neck tension on .284 in projectiles.
• Long-range hunters loading fire-formed brass for a single rifle — benefits from this 7mm-08 Remington reloading die set because it preserves exact fire-formed chamber dimensions while using the included body die to reset shoulder headspace and standard 7/8"-14 press tooling to maintain maximum case life.

Less suitable for: Handloaders producing ammunition intended for multiple rifles, semi-automatic actions, lever-action rifles, or extreme hunting environments where guaranteed feeding is critical; these applications exceed the capabilities of neck-only sizing and require a full-length sizing die set.