Description
This is Redding's #6 VLD Bullet Seating Micrometer, part number 09166, built to drop straight into most standard Redding seating dies in place of the factory seat plug. It brings competition-grade adjustability to dies you may already own, letting you set bullet seating depth in clean, repeatable increments without the guesswork of coarse threads. The VLD seat plug is cut to cradle the sleek, pointed profile of very low drag bullets so the ogive stays true and the bullet tip doesn't get marred during seating.
What the #6 VLD Micrometer Does on the Bench
The micrometer adjusts seating depth in increments of one thousandth of an inch, so when you find a load your rifle likes, you can return to that exact setting every session. That kind of repeatability is a big deal for precision rifle work, load development, and anyone chasing tight groups. It threads into most standard Redding seating dies using 1/2-20 threads and swaps over to another die in a matter of seconds, which makes it handy if you run several cartridges off the same bench.
Calibers the #6 Seat Plug Covers
The #6 plug is grouped for a specific family of cartridges. It fits popular rounds like 257 Roberts, 257 Roberts Ackley Improved, 257 Weatherby Magnum, 270 Winchester, 270 Weatherby Magnum, 6mm Remington, 6mm Remington Ackley Improved, 6mm TCU, 6mm-284 Winchester, 25-20 WCF, 256 Winchester Magnum, and 6.5x55mm Swedish Mauser, among others in the same bullet-diameter range.
Why Handloaders Reach for the Redding Micrometer Seat Plug
Machined from hardened steel in the USA, this plug holds its tolerances through years of use. If your cartridge isn't offered as a full Redding Competition Seating Die, this micrometer plug is the straightforward way to get that same dialed-in feel from a die you already run. It's a favorite upgrade for folks loading high-BC VLD bullets who want their seating depth locked down and dead consistent.
Key Specifications
- Manufacturer: Redding
- Manufacturer Part Number: 09166
- Model: #6 VLD Bullet Seating Micrometer
- UPC: 611760091667
- Bullet Type: VLD (Very Low Drag)
- Seat Plug Number: #6
- Replaces: Original seat plug 01066 (#6)
- Adjustment Increment: 0.001 inch (one thousandth)
- Thread Size: 1/2-20
- Material: Hardened steel
- Finish: Black
- Country of Origin: United States
- Quantity: 1
What’s Included
- Redding #6 VLD Bullet Seating Micrometer with seat plug (one unit)
Frequently Asked Questions
What does the #6 VLD Bullet Seating Micrometer fit?
It threads into most standard Redding seating dies using 1/2-20 threads and acts as a direct replacement for the original seat plug. The #6 plug covers a specific group of cartridges including 257 Roberts, 270 Winchester, 6mm Remington, 6.5x55mm Swedish Mauser, and others in that bullet-diameter family. Check the number stamped on your current seating stem to confirm you need the #6.
What's the difference between the VLD and standard seat plug?
The VLD plug is contoured to match the long, pointed nose of very low drag bullets so it contacts the bullet correctly without deforming the tip. The standard (STD) plug is shaped for traditional, more rounded bullet profiles. If you're loading sleek high-BC VLD bullets, the VLD version is the one you want.
How precise is the seating adjustment?
The micrometer adjusts in increments of one thousandth of an inch, so you can dial in a seating depth and return to it exactly. That repeatability is what makes it a go-to for precision rifle loads and load development. It takes the guesswork out of the coarse threads on a standard seating plug.
Do I need a Redding Competition Seating Die to use this?
No. This micrometer is designed to upgrade your existing standard Redding seating die, so you get competition-style adjustability without buying a whole new die. It's a great option when a full Competition Seating Die isn't offered for your cartridge.





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