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RCBS 20604 3-DIE SET 375 WINCHESTER
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SKU: 20604-076683206046
Overview
This die set is intended for loading straight-wall cartridges in .375 Winchester applications, giving handloaders the core tools needed to size, expand, and seat bullets with a roll crimp. The sizing die also de-primes the case, while the expander die prepares the mouth for bullet seating and helps create the flare or bell needed for feeding. The seater die completes the cartridge by seating the bullet and applying the roll crimp. It uses standard 7/8-inch-14 threads, and a shell holder is not included, so it is best suited to reloaders who already have compatible equipment and are set up to lubricate cases as required.
Why Hunters Choose the Rcbs
Loading Straight-wall
Cartridges
Three-die Set
Covers sizing, expanding, seating, and
Sizer Die
Sizes the case and de-primes
Expander Die
Prepares the case mouth for
Standard 7/8-inch-14
Thread fits common reloading setups
Key Features
- 3-die roll crimp set for loading straight-wall cartridges
- Steel sizer die sizes cases and de-primes
- Expander die opens the case to accept the bullet
- Expander die adds case mouth flare/bell for bullet feeding
- Seater die seats the bullet and applies a roll crimp
- Standard 7/8-inch-14 thread
- Shell holder not included
Best Used For
- Reloaders working with straight-wall .375 Winchester cartridges and standard 7/8-inch-14 dies
- Users needing a three-die setup for sizing, expanding, seating, and roll crimping
- Handloaders who already have a compatible shell holder and case lubricant on hand
- Shooters loading cartridges that require case mouth flare or bell for bullet feeding
- Reloading bench users seeking a dedicated die set for .375 Winchester cartridge preparation
Specifications
| Cartridge | 375 Winchester |
|---|---|
| Cartridge Type | Straight-wall cartridges |
| Expander Die Additional Function | Imparts case mouth flare/bell for bullet feeding |
| Expander Die Function | Expands the case to the proper diameter to accept the bullet |
| Lubrication Required | Cases must be lubricated |
| Seater Die Function | Seats the bullet and roll crimps |
| Set Type | 3-Die Roll Crimp Set |
| Shell Holder Included | No |
| Sizer Die Function | Sizes the case and de-primes |
| Sizer Die Material | Steel |
| Thread Size | Standard 7/8-inch-14 thread |
Pros
- Designed for loading straight-wall cartridges
- Three-die set covers sizing, expanding, seating, and roll crimping
- Sizer die sizes the case and de-primes
- Expander die prepares the case mouth for bullet feeding
- Standard 7/8-inch-14 thread fits common reloading setups
- Steel sizer die included in the set
Considerations & Trade-offs
- Designed for straight-wall cartridges, so it is not a general-purpose die set for every rifle cartridge type.
- Cases must be lubricated during sizing, which adds a prep step to the loading process.
- A shell holder is not included, so that component must be sourced separately if you do not already have one.
- The set uses standard 7/8-inch-14 threads, so compatibility depends on having matching reloading equipment.
Suggested Comparisons
- Straight-wall cartridge reloading die set
- Reloading die set
- Shell holder for 7/8-inch-14 dies
- Case lubrication supplies
Suggested Accessories
- Shell holder
- Case lubricant
- Reloading press
- Reloading die storage case
Frequently Asked Questions
What cartridge is this die set made for?
This set is listed as the RCBS 20604 3-Die Set for .375 Winchester.
Is this a full die set for straight-wall cartridge loading?
Yes. The product description says it is a 3-die roll crimp set for loading straight-wall cartridges.
What does each die do?
The sizer die sizes the case and de-primes, the expander die expands the case to the proper diameter and adds case mouth flare/bell, and the seater die seats the bullet and roll crimps.
Does this die set require case lubrication?
Yes. The product notes that cases must be lubricated.
Is a shell holder included?
No. The specifications state that a shell holder is not included with this die set.