The Mighty Armory Gold Match .300 Blackout Full Length Sizing Die returns fired brass to true SAAMI specifications from the case head to the neck for dependable chambering and consistent performance. Shoulder bump is easy to adjust from zero to -.005" with a simple turn of the die, allowing you to fine-tune your sizing for your rifle.
Full length sizing produces reliable feeding, proper shoulder setback, consistent neck tension, and repeatable chamber fit. For the majority of .300 Blackout reloaders, full length sizing is recommended to maintain reliable function. Neck sizing alone can eventually lead to oversized cases and reduced brass life.
Precision CNC Machined. Machined in the USA. High grade tool steel and heat treated for strength. Mirror-smooth 5 Bore Finish with a single-point cut internal surface. Effortless sizing while maintaining precise case alignment. The hardened bore measures 60 Rockwell. Easily load in spec for millions of cycles.
Drop-In Mandrel Expander Shaft. Swiss-machined, heat treated to 50 Rockwell and provides consistent case mouth expansion for smooth, uniform bullet seating. Designed with three points of concentric support inside the die body, the shaft remains perfectly aligned throughout the sizing process.
The threaded mandrel accepts either a Mighty Armory decapping pin or an optional pointer. When used in place of the decapping pin, the pointer protects the shaft threads while guiding the case smoothly into the die during sizing.
Effortless Decapping. The integrated primer flicker cap uses a spring-loaded design to prevent spent primer pullback and minimize press chute jams for smoother operation. Built for durability, the die is engineered to deliver well over one million sizing and decapping cycles.
Experience the Benefits
- Returns brass to true SAAMI specifications
- Adjustable shoulder bump from 0 to -.005"
- Uniform neck tension for consistent bullet seating
- Reliable chambering and feeding
- Precision CNC machined in the USA
- Premium heat-treated tool steel construction
- Ultra-smooth 5 Bore Finish for reduced sizing effort
- Concentricity of -.0005" at the case mouth and shoulder radius
- Tool-free setup and adjustment
- Produces precision ammunition with consistency beyond typical factory ammo
Recommended Case Lubricants
Single Stage or Turret Presses: Imperial Sizing Wax
Progressive Presses: PEG75 lanolin spray for smooth, high-volume case sizing.
See, Feel and Shoot the Difference with Mighty Armory Precision Reloading Dies.
- World's Toughest Reloading Dies
- Precision Reloading Tools
- Made in the USA
