Description
If you're loading 300 AAC Blackout and want flexibility in how you prep your brass, this Redding Deluxe set covers the bases. It's a three-die package that takes the standard full length set and adds a dedicated neck sizing die, giving you options depending on the rifle you're feeding. The full length sizing die resizes the case body, shoulder, and neck back to minimum SAAMI dimensions, which is exactly what you want for reliable feeding in an AR or any semi-auto. The seating die handles bullet seating with a built-in crimp ring and the proper seating plug, and the full length die carries a decapping rod assembly with a neck expander button.
Why the Neck Sizing Die Matters in This Set
The extra die is where the Deluxe set earns its name. If you're running a bolt gun and keeping brass dedicated to that chamber, neck sizing only works the neck of the case, leaving the body fire-formed to your rifle. That tends to extend case life and can tighten up accuracy. Just keep in mind that neck-sized-only brass is meant for the rifle it was fired in, so for ammo that needs to run across multiple 300 Blackout guns, you'll want to full length size instead.
How the Redding 84327 Set Is Built
Redding machines these dies from quality alloy steel on Hardinge Super-Precision lathes, holding the kind of tolerances the company is known for. They're heat treated in atmospherically controlled furnaces, hand polished for smooth operation, then inspected and ultrasonically cleaned before packaging. All three use the industry standard 7/8-14 thread, so they'll thread right into any standard single stage or turret press. The dies ship in Redding's plastic storage box, which doubles as a loading block and includes a spot for your shellholder.
Whether you're loading subsonic plinkers or supersonic loads for the AR, this set gives you the control to dial in consistent, repeatable 300 Blackout ammo. A shellholder is sold separately and you'll want the #10 for this cartridge.
Key Specifications
- Manufacturer: Redding
- Manufacturer Part Number: 84327
- UPC: 611760843273
- Cartridge: 300 AAC Blackout
- Set Type: Deluxe 3-Die Set
- Number of Dies: 3
- Dies Included: Full Length Sizing, Neck Sizing, Bullet Seating
- Thread Size: 7/8-14
- Bullet Diameter: 0.308
- Recommended Shellholder: #10 (sold separately)
- Material: Heat-treated alloy steel
- Country of Origin: United States
What’s Included
- Full length sizing die with decapping rod assembly and neck expander
- Neck sizing die
- Conventional bullet seating die with built-in crimp ring and seating plug
- Spare decapping pin
- Hex wrench
- Plastic die storage box with shellholder slot
Frequently Asked Questions
Does the Redding 300 Blackout Deluxe set come with a shellholder?
No, a shellholder is not included and is sold separately. For 300 AAC Blackout you'll want a #10 shellholder. The die box does have a dedicated slot to store it once you've got one.
What's the difference between this Deluxe set and the standard full length set?
The standard full length set includes a full length sizing die and a seating die. This Deluxe set adds a dedicated neck sizing die, giving you the option to neck size only when you're loading for a single rifle. That extra die is the main reason to step up to the Deluxe version.
Will these dies work in a standard reloading press?
Yes. All three dies use the industry standard 7/8-14 thread, so they thread into any common single stage, turret, or progressive press that accepts standard dies. No special adapters needed.
Is this set good for loading 300 Blackout for an AR-15?
Absolutely. The full length sizing die returns fired brass to minimum SAAMI dimensions, which is what you want for reliable feeding and cycling in a semi-auto. For AR loads, stick with full length sizing rather than neck sizing so your rounds chamber dependably.




Reviews
There are no reviews yet.