Generation II Expander Dies .17-.338 Caliber UPC 050806111158 - Sinclair International Precision Reloading Tool for Case Neck Preparation
Precision reloaders, elevate your brass prep game with the Sinclair International Generation II Expander Dies (UPC: 050806111158) – the ultimate case neck expander die for .17 to .338 caliber cartridges. This stainless steel masterpiece, designed as the perfect companion to neck turning tools, expands dented or undersized case necks, ensures uniform sizing for consistent bullet tension, and enables easy "necking up" for wildcat loads. Featuring an innovative Gen II design that fully encloses the mandrel to prevent pull-out and an O-ring for self-centering, it delivers superior concentricity and reliability in every pass. Ideal for high-volume reloaders working with .223 Rem, 6.5 Creedmoor, .308 Win, or precision rifle calibers – invest in accuracy with this Brownells/Sinclair expander die body.
Key Features of the Generation II Expander Dies
- Gen II Mandrel Capture System: Fully encloses the interchangeable mandrel, eliminating pull-out during use for safer, more consistent operation.
- Self-Centering O-Ring Design: Allows the mandrel to float slightly, automatically centering within the case neck for optimal concentricity and reduced runout.
- Precision Stainless Steel Construction: Machined to exact tolerances for durability, corrosion resistance, and long-term performance in demanding reloading setups.
- Standard 7/8"-14 Threading: Fits virtually all single-stage and progressive reloading presses; includes Sinclair Stainless Steel Split Lock Ring for secure adjustments.
- Versatile Applications: Fixes shipping dings, irons out neck imperfections, preps for neck turning, or expands necks for wildcatting – one tool, endless uses.
- Caliber-Specific Mandrels: Compatible with Sinclair expander mandrels (.001" larger than turning mandrels; sold separately for exact fit).
- Made in USA: By Sinclair International (Brownells) – trusted by benchrest shooters and precision reloaders worldwide.
Technical Specifications
| Attribute | Details |
|---|
| UPC | 050806111158 |
| Model | 749011715 / STD 7/8-14 Expander Die Body |
| Caliber Range | .17 to .338 (e.g., .172, .223, 6.5mm, .308, 7mm) |
| Material | Stainless Steel |
| Thread Size | 7/8"-14 |
| Includes | Die Body, Split Lock Ring (Mandrels Separate) |
| Weight | ~8-10 oz (Compact Design) |
| MSRP | $49.99-$57.99 |
Supported Calibers and Applications
Perfect for popular rifle cartridges including:
- Small Calibers: .17 HMR, .204 Ruger, .223 Rem / 5.56
- Mid-Range: .243 Win, 6mm Creedmoor, 6.5 Creedmoor / Grendel, .260 Rem, .270 Win
- Large Bore: .308 Win / 7.62x51, .30-06, 7mm Rem Mag, .338 Lapua (up to .338)
Use for neck turning prep (with Sinclair tools), dent removal, or reforming brass.
Step-by-Step Usage Guide
- Select and insert matching mandrel (expander type) into die body; secure cap hand-tight.
- Thread die into press ram ~1" from shellholder; adjust for case entry.
- Lubricate case neck interior (e.g., case lube or FP-10).
- Test on scrap brass: Slowly raise ram to expand neck to desired size.
- Lock with split ring; process cases at steady pace.
- Clean die after use; inspect mandrel for wear.
Safety: Wear eye protection; use only compatible mandrels; follow Sinclair instructions.
Reloader Reviews and Feedback
Average 4.8/5 stars: "Transforms dented brass – concentricity is spot-on!" "Essential for neck turning; worth every penny." Forum users (AccurateShooter) note easy setup after practice, great for wildcats. Minimal cons beyond separate mandrel purchase.
Pricing, Availability, and Purchase Options
Street price $49.99 at Brownells (primary source), $51.89 at Palmetto State Armory, up to $60 elsewhere. Often in stock at BattleHawk Armory or TheGunDock. Pair with Sinclair mandrels for complete setup – reload with precision today!
Master case prep like a pro with the Generation II Expander Dies UPC 050806111158. Your path to sub-MOA accuracy starts here.
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