Description
Area 419 built the Zero M-Series Sizing Die to take the guesswork out of sizing .300 PRC brass. This is the full-length sizing die the Zero press crowd has been waiting on, with a micrometer dial up top that lets you set shoulder bump precisely and come back to the same number every time. It sizes the case from the neck all the way down to the extractor groove, which is a big part of why folks running it report consistent, repeatable headspace and no more sticky bolt after the second or third firing.
Instead of the old multi-step routine of a body die, a bushing, and a separate mandrel pass, this die handles it in one pull of the handle. A precision-ground expander mandrel sets your neck tension on the way out, and every die ships with a .002" mandrel. If you want to tune tension up or down, Area 419 offers a mandrel kit with additional increments. The spring ejection system kicks out spent primers cleanly, the steel decap pin is replaceable when it eventually wears, and the hydraulic shoulder pressure relief keeps the case from getting deformed during the stroke.
What Sets the Zero M-Series .300 PRC Die Apart
This is a 1-1/4" die, so it needs a Hybrid or 1-1/4" turret on your Zero press or another press set up for that thread. It will not run in a 7/8" turret or a standard 7/8" press. Just as important, the M-Series body requires a large-diameter shell holder rim, so standard shell holders and the older headspace-adjustable kits won't fit. The good news is this package ships with the Zero M-Series shell holder, so you've got the matched pair right out of the box.
Dialing In Your .300 PRC Brass
The die is reamer-cut to exacting dimensions for a true size, which is where a lot of the accuracy gains come from. Reloaders running .300 PRC report holding shoulder bump to around half a thousandth with regularity once it's set. It's heavy-duty, it's 100% made in America, and it drops right into the Zero workflow if you're already invested in that system.
Key Specifications
- Cartridge: .300 PRC
- Die Type: Full-Length Sizing Die
- Die Size: 1-1/4"
- Thread: 1-1/4"-12
- Compatible Turret: 1-1/4" or Hybrid
- Adjustment: Micrometer Headspace / Shoulder Bump
- Neck Tension Mandrel: .002" (included)
- Material: Steel
- Country of Origin: United States
- Manufacturer: Area 419
- MPN: 419-ZeroDie-M300PRCSH
- UPC: 810080182042
- Shipping Weight: 3.236 lbs
What’s Included
- Zero M-Series .300 PRC full-length sizing die
- Zero M-Series shell holder
- .002" neck tension expander mandrel
- Area 419 Zero die ring
- Spare decapping pin
- Install and removal tools
- Storage case
Frequently Asked Questions
What press do I need to run the Zero M-Series .300 PRC die?
This is a 1-1/4" die, so it requires a Hybrid or 1-1/4" turret on your Zero press or another press set up for that larger thread. It will not work in a 7/8" turret or a standard 7/8" press. If you're already running the Area 419 Zero system, it drops right in.
Can I use a standard shell holder with this die?
No. The M-Series design requires a larger-diameter shell holder rim, so standard shell holders and the older headspace-adjustable kits will not fit. This package includes the Zero M-Series shell holder, so you have the matched set ready to go out of the box.
Does this die set neck tension, or do I need a separate mandrel step?
It handles both in a single stroke. A precision-ground expander mandrel sets your neck tension on the way out, and the die ships with a .002" mandrel. If you want to adjust tension, Area 419 sells a mandrel kit with additional diameters.
Does it adjust shoulder bump precisely?
Yes. The micrometer dial on top lets you set headspace and shoulder bump accurately and return to the same number every time. Reloaders using it on .300 PRC report holding bump to within about half a thousandth once it's dialed in.





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