Reloading 300 Blackout ammo requires reliable sizing dies that deliver consistent neck tension and dependable overall accuracy. Below is a curated collection of high-quality sizing and related die sets from trusted brands. Each entry includes core features to help you compare die sets for 300 AAC Blackout, including full-length sizing, neck sizing options, seating and crimp capabilities, and compatibility with various presses. This guide emphasizes objective specs and practical performance considerations for American shooters.
Product Summary
| Product | Brand | Die Type & Uses | Key Features |
|---|---|---|---|
| Lee Precision 91118 | Lee Precision | Full Length Sizing Die | Steel construction, resizing lubricant required |
| Lee Precision 300 AAC Blackout 3-Die Set | Lee Precision | Full Length Sizing, Seating, Crimp | Includes universal shell holder, powder dipper, load data |
| Lee Precision 91925 Breech Lock Breech Lock Pacesetter 3-Die | Lee Precision | Full Length Sizing, Seating, Crimp | Breech lock system, color-coded bushings |
| Hornady Custom Grade New Dimension 2-Die Set | Hornady | Full Length Sizer, Seating/Crimp Die | Zip Spindle for stable alignment, precision finish |
| Redding Deluxe Die Set | Redding | Full Length Sizing, Neck Sizing, Seating | Versatile 3-die design, neck sizing options |
Lee Precision 91118: Fl Size Die 300 AAC Blackout
Leonard Lee’s 91118 is a full-length sizing die crafted in durable steel for 300 AAC Blackout cases. This die is designed to resize the entire case length and neck, ensuring uniform dimensions through each reload cycle. The kit typically requires a lubrication step to smooth sizing, and it integrates with standard press setups that use size dies. This option emphasizes reliability in consistent case sizing, a foundational step for preciseReloads.
Lee Precision 300 AAC Blackout Very Limited 3-Die Set
This highly regarded three-die set from Lee Precision includes a Full Length Sizing Die, a Dead-Length Bullet Seating Die, and a Factory Crimp Die, along with a universal shell holder, powder dipper, and load data. It’s designed for comprehensive 300 Blackout reloading workflows, offering straightforward adjustments and practical data for accurate seating and crimping. The universal shell holder simplifies setup across compatible presses.
Lee Precision 91925: Breech Lock Breech Lock Pacesetter 3 Die Set
Lee’s 91925 Breech Lock set adapts to Breech Lock systems for fast die changes. It includes a Full Length Sizing Die, a Dead Length Seating Die, and a Factory Crimp Die. Color-coded spline drive breech bushings assist with quick die identification, reducing setup time and minimizing misalignment during adjustments. This set is well-suited for shooters who value modularity and streamlined changes.
Forster Full Length Bench Rest Sizing Die 300 AAC Blackout
Forster’s full-length sizing die emphasizes precise neck alignment and pulled-neck control when used with Forster-compatible presses. The product notes indicate an elevated expander ball to better align case and neck during sizing, which can contribute to improved concentricity and uniform neck tension. Follow manufacturer guidelines on shellholders for non-Forster presses to optimize results.
Hornady Custom Grade New Dimension 2-Die Set, 300 Blackout
Hornady’s Custom Grade New Dimension 2-Die Set includes a full-length sizing die and a seating/crimping die designed for the 300 Blackout (.308). The dies are finished for a smooth operation and reliable seating and crimping with consistent results. The adjustable seating die and precise alignment features support accurate, repeatable reloads for handgun- and rifle-length 300 Blackout rounds.
Redding Deluxe Die Set for Bottleneck Cases
Redding’s Deluxe Die Set for bottleneck cases provides a versatile 3-die arrangement: full length sizing, neck sizing, and a conventional seating die. It supports both full-length sizing across multiple chambers and neck sizing for precision in bolt-action configurations. Neck sizing can improve case life and consistency, especially with well-muited brass and matched components.
RCBS .300 AAC Blackout SB Taper Crimp Die Set
RCBS’s taper crimp die adds a dedicated taper-crimp seating die to the 300 Blackout workflow, designed to simplify reloading for AR-style or semi-auto platforms. The small-base sizing die reduces case expansion, contributing to repeatable case dimensions. This set is beneficial when the goal is consistent crimp with reduced chamber interference.
Buying Guide: Key Purchase Considerations for 300 Blackout Sizing Dies
- Die type and workflow: Full-length sizing dies are versatile across multiple chambers, while neck-sizing dies are preferred for precision bolt-action setups. A 3-die set typically includes sizing, seating, and crimping functions.
- Compatibility with presses: Ensure the dies’ mounting threads match your press (most common is 7/8″-14 inch thread). Breech Lock and Quick-Change systems improve setup speed for frequent dies changes.
- Neck tension and bushing options: Neck-sizing dies with interchangeable bushings let you fine-tune neck tension. Forster, Redding, and RCBS offer options that support precise neck sizing control.
- Expander ball design: An elevated expander ball or a well-constructed neck expander is critical for concentric neck alignment and minimizing run-out during sizing.
- Crimping approach: Full-length seating dies with adjustable crimp or separate crimp dies influence cartridge seating consistency and case shrinkage in fast-burning 300 Blackout loads.
- Durability and finish: Steel dies and machined components from brands like Hornady, Redding, RCBS, and Lee tend to endure heavy reloading cycles with stable dimensions.
- Load data and data accessibility: Look for sets that include clear instructions or easy access to load data. Lee’s and Hornady’s sets commonly come with practical load guidance for 300 Blackout reloading.
- Price and value: Three-die sets that bundle shell holders, dippers, or data accessories offer better value, especially for beginners building a complete reload kit.
- Brand support and warranty: Reputable brands provide better customer support and replacement parts, ensuring long-term reliability for essential reloading components.
When evaluating die sets for 300 AAC Blackout, prioritize consistent sizing, stable neck tension, and reliable seating with proper crimp. Choose a configuration that aligns with your gun platform, whether you shoot semi-automatic AR-style rifles or precision bolt-action rifles. A balanced combination of robust dies and quality brass will yield more uniform accuracy across reloads.