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RCBS 15401 F L DIE SET .303 BRITISH
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
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SKU: 15401-076683154019
Overview
This two-die set is built for reloading bottleneck cases in .303 British, giving handloaders the tools needed to size, de-prime, expand the neck, and seat bullets in a controlled sequence. The full-length sizer brings cases to SAAMI minimum cartridge dimensions and uses vents to help reduce the risk of case damage from trapped air or excess lubricant. The seater die includes a built-in roll crimper to secure the bullet as it is seated, and the set uses standard 7/8-inch-14 threads. A shell holder is not included, so it is best suited for reloaders who already have the needed press setup and components.
Why Hunters Choose the Rcbs
Two-die Set
Covers full-length sizing and bullet
Full-length Sizer
Die brings cases to SAAMI
Sizer Die
De-primes and expands the neck
Built-in Vents
Help reduce case damage from
Seater Die
Includes a built-in roll crimper
Key Features
- Two-die set for reloading bottleneck cases
- Includes a Full-Length Sizer Die with Expander-Decapping Unit
- Includes a Seater Die with Bullet Seater Plug
- Sizer die brings cases to SAAMI minimum cartridge dimensions
- Sizer die vents help prevent case damage from trapped air or excess lubricant
- Seater die includes a built-in roll crimper
- Standard 7/8-inch-14 thread; shell holder not included
Best Used For
- Reloaders working with .303 British bottleneck cases for full-length sizing and bullet seating
- Handloaders who want a two-die setup with sizing, decapping, expanding, and seating functions
- Users needing a built-in roll crimp during bullet seating for secured cartridge assembly
- Reloading bench setups where a shell holder is already on hand, since none is included
Specifications
| Die Type | Two-die set |
|---|---|
| Full Length Sizer Die Features | Expander-Decapping Unit; vents to prevent case damage caused by trapped air and excessive lubricant |
| Headspace | Held to minimum tolerances |
| Included Dies | Full-Length Sizer Die; Seater Die |
| Intended Use | Reloading bottleneck cases |
| Seater Die Features | Bullet Seater Plug; built-in roll crimper |
| Shell Holder Included | No |
| Sizer Die Function | Brings the case to SAAMI minimum cartridge dimensions; sizes the outside of the case; de-primes; expands the neck to accept the bullet |
| Thread Size | Standard 7/8-inch-14 |
Pros
- Two-die set covers full-length sizing and bullet seating for bottleneck cases.
- Full-Length Sizer Die brings cases to SAAMI minimum cartridge dimensions.
- Sizer die de-primes and expands the neck to accept the bullet.
- Built-in vents help reduce case damage from trapped air or excess lubricant.
- Seater Die includes a built-in roll crimper for seating and crimping together.
- Standard 7/8-inch-14 thread fits common reloading setups.
Considerations & Trade-offs
- A shell holder is not included, so this set is not complete on its own for setup at the press.
- The full-length sizing die brings cases to SAAMI minimum cartridge dimensions, which may be more sizing than some reloaders want for brass that will stay with a single rifle.
- The seater die includes a built-in roll crimper, so it is geared toward seating and crimping together rather than a separate crimping step.
- This is a two-die set for bottleneck cases, so it is specific to .303 British and similar full-length bottleneck reloading needs rather than a universal die solution.
Suggested Comparisons
- Bottleneck rifle reloading die sets
- Full-length sizing die sets
- Bullet seating and crimping dies
- Cartridge-specific reloading dies
Suggested Accessories
- Reloading press
- Shell holder
- Case lubricant
- Case trimmer
Frequently Asked Questions
What comes in the RCBS 15401 F L Die Set .303 British?
It includes two dies: a Full-Length Sizer Die with an Expander-Decapping Unit, and a Seater Die with a Bullet Seater Plug.
Is a shell holder included with this die set?
No. The product data states that a shell holder is not included.
What type of cases is this die set intended for?
It is intended for reloading bottleneck cases.
What does the Full-Length Sizer Die do?
According to the product description, it brings the case to SAAMI minimum cartridge dimensions, sizes the outside of the case, de-primes it, and expands the neck to accept the bullet.
Does the Seater Die do anything besides seat the bullet?
Yes. The included Seater Die has a built-in roll crimper to secure the bullet at the same time it is seated.