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Seating depth is one of those small details that separates okay loads from tack-drivers, and this is the part that lets you take control of it. The Redding #20 Standard Bullet Seating Micrometer replaces the original seat plug in your standard seating die and gives you a precise, repeatable way to adjust how deep your bullet sits in the case. Instead of guessing with a locknut and a wrench, you turn the micrometer barrel and read your setting right off the numbers, down to 1/1000th of an inch.
The #20 designation covers a wide range of popular .30 and .33 caliber cartridges, including 308 Winchester, 30-06 Springfield, 300 WSM, 300 Weatherby Magnum, 30-30 Winchester, 300 RCM, 325 WSM, 338 Federal, 7mm Rem SAUM and 8mm Mauser, among others. This is the standard-bullet version, so it handles most common bullet shapes just fine, including polymer-tipped designs. Redding also builds VLD and flat-nose versions for those specialty projectiles, but for typical hunting and target bullets in these calibers, the standard #20 is the one you want.
Installation is about as simple as it gets. The micrometer is a direct replacement for the original seat plug, threading into any seating die that uses the 1/2-20 thread pattern. Because it swaps out so easily, you can move it between dies as needed. One thing worth knowing up front: this is meant for standard seating dies. It will not work with Redding's Competition Seating Dies, since those already have a built-in micrometer.
Each plug is machined from steel alloy, then hand finished and inspected before it leaves the shop. That attention shows up on the bench, where the micrometer holds its setting load after load and lets you fine-tune your jump to the lands when you're chasing that last bit of accuracy. If you've been running a good seating die but wishing for repeatable depth adjustments, this is a straightforward upgrade that pays off every time you sit down to load.
The #20 covers a broad group of .30 and .33 caliber cartridges, including 308 Winchester, 30-06 Springfield, 300 WSM, 300 Weatherby Magnum, 30-30 Winchester, 300 RCM, 325 WSM, 338 Federal and 7mm Rem SAUM. Redding groups cartridges by micrometer number, so if your current seat plug is a #20, this drops right in. When in doubt, match the number stamped on your existing seat plug.
No. Competition Seating Dies already come with a built-in micrometer, so this replacement plug is not meant for them. It's designed for standard seating dies that use the 1/2-20 thread pattern, where it swaps in for the original seat plug.
Yes. The standard version handles most common bullet shapes, including polymer-tipped designs, which covers the majority of hunting and target loads in these calibers. If you're running true VLD or flat-nose bullets, Redding makes dedicated micrometers with matching stems for those profiles.
The micrometer lets you set and repeat seating depth to within 1/1000th of an inch. That kind of control makes it easy to fine-tune your bullet's jump to the lands during load development and return to a proven setting later. It's a genuine step up from adjusting a plain seating stem by feel.
| UPC | 611760090806 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 09080 |
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