Lee Full-Length 3-Die Set .577/450 Martini/Henry (Large Series Thread 1-1/4
$97.50
The Lee Full-Length 3-Die Set for .577/450 Martini/Henry is purpose-built for handloaders working with this classic British rifle cartridge. This Large Series die set gives you everything needed to resize, seat, and crimp ammunition on your progressive or single-stage press, making it a practical choice for shooters committed to feeding their vintage Martini/Henry rifles with quality handloads. The set's full-length sizing die ensures consistent chamber fit across your brass, while the included factory crimp die delivers reliable, uniform crimps that support both accuracy and feeding reliability.
Lee's Large Series dies are engineered for calibers and pressures that demand robust construction, and the 1-1/4" x 12 thread standard means your dies will fit any compatible press in your reloading bench. Whether you're a serious black-powder rifle enthusiast or a historical shooter looking to keep a Martini/Henry running, this set eliminates the guesswork of sourcing individual components and ensures you have a matched system from a trusted reloading equipment maker.
The complete kit ships with a shell holder, powder dipper, and detailed instructions—everything you need to start full-length reloading for this distinctive cartridge. If you're working with .577/450 Martini/Henry ammunition, this is a straightforward way to maintain your own supply and dial in loads tailored to your rifle and shooting goals.
What's Included
- Full-length sizing die
- Bullet seating die
- Factory crimp die
- Shell holder
- Powder dipper
- Instructions
Specifications
| Caliber | .577/450 Martini/Henry |
| Die Series | Lee Large Series |
| Thread Size | 1-1/4" x 12 |
| Number of Dies | 3 |
Frequently Asked Questions
Will this die set work with my reloading press?
The Lee Large Series dies use 1-1/4" x 12 threads, which are the standard for Lee's larger-frame presses and many other press designs. Verify that your press accepts this thread size before ordering.
What's the difference between a factory crimp die and a standard crimp die?
A factory crimp die applies a more uniform, roll crimp that mimics factory ammunition and is often preferred for rifles. This set includes that factory crimp die as its third die.
Is this set suitable for both rifle and pistol reloading?
This is a rifle die set specifically configured for .577/450 Martini/Henry. It is not designed for pistol cartridges.
Do I need any additional equipment to start reloading with this set?
You will need a reloading press with 1-1/4" x 12 threads, brass, bullets, powder, and primers. This set provides the dies, shell holder, powder dipper, and instructions to get started.
