Description
If you run a Lee Auto Breech Lock Pro or Pro 4000 progressive press and want to load 45 Winchester Magnum, the #3 shell plate is the piece that makes it happen. It's the component that indexes your brass through the press, carrying each case from station to station so priming, powder, and seating all line up the way they should. Built from steel and machined to Lee's spec, it drops into the press and keeps cases held square for clean, repeatable rounds.
What the Breech Lock Pro Shell Plate #3 Handles
This plate is cut specifically for 45 Win Mag and similar case heads. Caliber selection on these presses comes down to matching the right shell plate to your cartridge, and #3 is the one that covers the big 45 Win Mag family. If you're building a progressive setup around that round, this is the plate you need in the carrier.
Quick Caliber Changes on the Pro 4000 and Auto Breech Lock Pro
One of the nicest things about the Lee progressive system is how fast you can switch between calibers. Keep a few plates on hand and you can move from one cartridge to another without a lot of wrenching around. Worth knowing up front: these Breech Lock Pro plates are made just for the Auto Breech Lock Pro and Pro 4000 presses, so they won't interchange with Lee's Pro 1000 or Load-Master plates. Match the plate to the press and you're set.
Why the #3 Plate Earns Its Keep
The steel construction holds up to the repeated indexing a progressive press puts it through, and the precise machining keeps your brass centered so bullets seat straight and primers feed cleanly. For anyone loading 45 Win Mag in volume, having the correct dedicated shell plate takes the guesswork out of running the press and lets you focus on turning out quality ammo. Made in the USA by Lee Precision.
Key Specifications
- Manufacturer: Lee Precision
- Model: Auto Breech Lock Pro / Pro 4000 Shell Plate
- Shell Plate Number: #3
- Caliber: 45 Winchester Magnum
- Material: Steel
- Compatible Presses: Lee Auto Breech Lock Pro and Pro 4000
- Country of Origin: USA
- Manufacturer Part Number: 90629
- UPC: 734307906290
- Sold As: Each
What’s Included
- One Lee Breech Lock Pro Shell Plate #3 (45 Win Mag)
Frequently Asked Questions
What caliber does the Breech Lock Pro Shell Plate #3 fit?
The #3 plate is cut for 45 Winchester Magnum and similar case heads. If you're loading 45 Win Mag on a Lee progressive press, this is the correct plate to run.
Will this shell plate work on my Lee Pro 1000 or Load-Master press?
No. These Breech Lock Pro plates are designed specifically for the Lee Auto Breech Lock Pro and Pro 4000 presses and will not interchange with the Pro 1000 or Load-Master shell plates. Make sure you're matching the plate to the right press.
What is a shell plate used for on a progressive press?
The shell plate holds and indexes your brass, carrying each case through the stations so priming, powder charging, and bullet seating all line up. Changing to a different caliber usually just means swapping to the correct plate for that cartridge.
What is the shell plate made of?
This plate is machined from steel, which holds up well to the repeated indexing of a progressive press. The precise machining keeps cases centered for clean, consistent loading.




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