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RCBS 21904 3-DIE SET 350 LEGEND
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
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SKU: 21904-604544652437
Overview
Built for reloading straight-wall cartridges, this 3-die set provides the core steps needed to prepare cases, expand the mouth, and seat and crimp bullets. The steel sizer die sizes the case and de-primes it, while the expander die brings the case to the proper diameter and adds the flare or bell needed for bullet feeding. The seater die then seats the bullet and applies the crimp. Cases must be lubricated, and a shell holder is not included with the set.
Why Hunters Choose the Rcbs
Loading Straight-wall
Cartridges
Steel Sizer
Die sizes cases and de-primes
Expander Die
Prepares case mouth for bullet
Seater Die
Seats bullets and applies crimp
Clear Note
Cases must be lubricated
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 also adds case mouth flare/bell for feeding
- Seater die seats the bullet and crimps
- Cases must be lubricated; shell holder not included
Best Used For
- Handloaders working with straight-wall cartridges and standard three-die roll crimp setups
- Reloaders who need case sizing, expansion, seating, and crimping in one die set
- Users loading 350 Legend ammunition for a press setup with compatible shell holder
- Reloaders who already have a shell holder and want a die set-only solution
- Hunters building consistent straight-wall loads for range practice and field use
Specifications
| Cartridge | 350 Legend |
|---|---|
| Compatible Cartridge Type | Straight-wall cartridges |
| Expander Die Function | Expands the case to the proper diameter to accept the bullet; imparts case mouth flare/bell for bullet feeding |
| Lubrication Required | Yes |
| Seater Die Function | Seats the bullet 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 |
Pros
- Designed for loading straight-wall cartridges
- Steel sizer die sizes cases and de-primes
- Expander die prepares case mouth for bullet feeding
- Seater die seats bullets and applies crimp
- Clear note that cases must be lubricated
- Shell holder is not included with the die set
Considerations & Trade-offs
- Cases must be lubricated before use, which adds a step to the loading process.
- A shell holder is not included, so that component must be sourced separately.
- This is a 3-die roll crimp set for straight-wall cartridges, so it is intended for that specific loading application rather than a broader range of cartridges.
- The expander die adds case mouth flare/bell for bullet feeding, which is useful for setup but means the process includes an extra adjustment step.
Suggested Comparisons
- Straight-wall cartridge die sets
- Reloading die sets
- Case sizing and seating dies
- Shell holders for reloading
Suggested Accessories
- Shell holder
- Case lubricant
- Reloading press
- Reloading scale
Frequently Asked Questions
What type of cartridges is this die set designed for?
It is designed for loading straight-wall cartridges.
What does the sizing die do in this set?
The steel sizer die sizes the case and de-primes it. The product notes that cases must be lubricated.
What is the purpose of the expander die?
The expander die expands the case to the proper diameter to accept the bullet, and it also imparts a case mouth flare/bell for bullet feeding.
What does the seater die do?
The seater die seats the bullet and crimps it.
Does this die set include a shell holder?
No. The product specifications state that a shell holder is not included with this die set.