Whether you’re building accurate 38-40 Winchester loads or reloading for .38 Special and .357 Magnum, the right set of dies makes a big difference. This guide presents five top 38-40 reloading die sets chosen for reliability, ease of use, and consistency. It targets serious hobbyists and enthusiasts who want repeatable performance, reliable crimps, and straightforward setup. Read on to identify which die set fits your workflow, brass, and preferred bullets. A quick buyer’s table is provided to compare core details side by side.
Buyer’s quick-reference table
- Lee Precision 38-40 3 Die Set — Best for starter-to-intermediate reloaders needing a complete, economical 3-die solution.
- Lee Precision 38-40 Factory Crimp Die — Best for improving crimp consistency on legacy or crimp-sensitive bullets.
- Redding Premium Die Set for Bottleneck Cartridges — Best for precision-focused reloaders seeking premium alignment and micrometer seating.
- Lee Precision Breech Carbide Lock 3-Die Set (38 Special/357 Magnum) — Best for users who want carbide sizing and quick setup with color-friendly bushings.
- Lee Precision .38 Special Carbide 3-Die Set — Best for those reloading .38 Special with a durable carbide option and versatile guidance for 357 Mag conversions.
Lee Precision 38-40 3 Die Set
The Lee 3-Die Set includes a full resizing, expanding, seating die trio designed for 38-40 cartridges. The package dimensions are compact and the weight is light for easy handling during bench work. This set targets hobbyists who want a straightforward, budget-friendly option suitable for a mix of pistol cartridges. Best for beginners upgrading from basic kits or reloaders who value a simple, all-in-one solution for standard ball or jacketed bullets.
Best for: Basic to mid-level reloading setups focusing on ease of use and cost efficiency. Why selected: It provides the core dies needed to resize, expand, and seat with a conventional workflow. Caution: Data sheet specifics like case length tolerance and exact bullet seating depth require careful measurement against your chosen load data.
Lee Precision 38-40 Factory Crimp Die
The Factory Crimp Die is designed to secure bullets in place by applying a firm crimp, delivering improved consistency, including cases without crimp grooves. It’s manufactured in the USA and complements any 38-40 load routine where crimp uniformity translates to better chambering and consistent neck tension. Best for reloaders seeking stronger crimps and a straightforward upgrade to standard sets. Limitations: Crimp force should be adjusted to avoid over-crimping, which can deform bullets or case mouths.
Redding Premium Die Set for Bottleneck Cartridges
The Redding Premium Die Set for bottleneck cartridges includes three dies—NxGEN carbide sizing die, a specialized expander, and a premium seating die with a bullet seating micrometer. The large entry radius supports easy case entry, and the special expander design promotes a proper press fit and alignment while providing a bellmouth on the case mouth for lead bullets. Best for precision reloaders who value micrometer adjustments and meticulous alignment. Caution: The premium nature implies a higher price point and may require more careful setup for 38-40 variants than basic sets.
Lee Precision 91878: 38 Special / 357 Magnum Breech Carbide Lock 3-Die Set
This Breech Lock 3-Die Set includes carbide full-length sizing, a bullet seating die, and a powder-through expanding die, with color-coded Smart Lock bushings for easy die identification. The carbide sizing die reduces the need for case lubrication and promotes consistent resizing. Best for users who want a locked-in, easy-to-adjust setup and faster identification during reloading sessions. Limitation: Some adjustments may require minor turning to fine-tune seating depth and crimp for 38-40 loads.
Lee Precision .38 Special Carbide 3-Die Set (Silver)
This 3-die set is designed for .38 Special and can be used with the 357 Magnum by adjusting the powder through expander and seating dies. It includes an universal shell holder and a powder dipper and emphasizes a durable build with long-lasting carbide sizing. Best for reloaders who want a versatile option that can also accommodate 357 Magnum conversions with careful die setup. Caution: Converting to 357 Mag requires careful adjustment to maintain proper overall cartridge length and seating depth.
90861 Lee Precision, Carbide Factory Crimp Die, .38 Special
The Carbide Factory Crimp Die for .38 Special is designed to crimp while sizing, ensuring rounds chamber smoothly and consistently. This die helps ensure factory-like dependability for rounds that must feed reliably in a range of pistols. Best for reloaders prioritizing stable crimp while minimizing resizing steps. Limitation: Requires compatible standard dies in the set and careful seating-depth calibration to avoid over-crimping or under-crimping on varied bullet types.
LEE PRECISION 91146: Powder Thru Die 38-40
This powder-through die includes the expanding function to charge the case with powder while expanding the mouth. It’s ideal for reloading workflows that combine powder dropping with case preparation. Best for experienced reloaders who want to streamline powder charging in a single station. Caveat: This die is specific to powder-through operation; it should be paired with compatible powder measures and funnels for consistency.
Buying Guide: Key Considerations for 38-40 Die Sets
- Intended cartridge range: If you reload both 38-40 and its relatives, consider a die set that supports adjustments for 357 Magnum or back-to-back ammo conversions.
- Sizing method: Carbide dies reduce lubrication needs and can extend life for high-volume sessions. They are typically more durable but come at a higher price.
- Crimp control: A dedicated crimp die improves uniformity, especially for bullets without a visible crimp groove or with crimp-sensitive designs.
- Seating micrometer: A seating die with a micrometer or precise adjustment helps repeatable overall cartridge length and seating depth, crucial for accuracy.
- Locking mechanisms: Breech Lock or color-coded bushings simplify die setup and reduce misalignment risk during quick changes.
- Compatibility: Ensure the set matches your reloading press (Single-stage vs. turret) and shell holder system.
- Budget vs. value: Premium die sets offer better tolerances, longer life, and precise adjustments, while budget options cover basic needs for hobbyists.
Frequently Asked Questions
- What is the main advantage of a factory crimp die for 38-40 loads?
It provides a uniform, strong crimp that helps bullets stay in place and improves chambering consistency, especially for bullets without strong crimp grooves. - Do I need carbide dies for 38-40 reloading?
Carbide sizing dies reduce the need for lubrication and can increase die life in high-volume reloads, but non-carbide options are usually cheaper and adequate for occasional use. - Can I use a 38 Special die set for 357 Magnum?
Some setups permit slight adjustments to seating and powder-drop components, but you must verify overall cartridge length and seating depth for accuracy and safety. - Why would I choose a micrometer seating die?
A seating micrometer enables precise, repeatable bullet depth, essential for consistent accuracy across many rounds. - Is a powder-through expanding die necessary?
It’s helpful for streamlining powder charging within a single station, but not required if you don’t perform integrated charging. - Which die set is best for beginners?
A 3-die set that includes resizing, expanding, and seating with a simple, reliable crimp option is ideal for beginners starting with 38-40 and related calibers.