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If you're serious about squeezing every bit of accuracy out of your 300 Blackout handloads, the L.E. Wilson chamber-type seater is where a lot of precision reloaders end up. Instead of relying on threads and sliding collars like a conventional press die, this one holds the case completely stationary inside a chamber-shaped die body while the bullet is pushed straight down the center axis. That design is what gives Wilson dies their reputation for producing some of the lowest bullet runout you can get, which matters when you're chasing tight groups.
This is an inline hand die, so it runs on an arbor press or even a soft-faced mallet rather than a threaded press. You set a charged, primed case into the die body, balance a bullet on the case mouth, slide the die together, and press the seating stem down until it bottoms out. Because the case and bullet stay aligned the whole way, you eliminate the slop that creeps in with some other seating setups. The micrometer top uses an easy-to-read scale in .001" graduations, so fine tuning your seating depth is just a matter of clicking the dial. One full turn moves roughly .042", and major adjustments can be made through the 3/8"-24 threads in the cap.
The whole die is machined from long-lasting stainless steel and carries laser engraved markings so your settings are easy to read at a glance. It ships with the standard seating stem, which handles most common 300 Blackout bullet profiles nicely. If you're loading VLD or long-ogive match bullets, Wilson offers a VLD stem separately that can improve seating consistency on those shapes.
One thing a lot of folks love about these dies is range-side load development. Since there's no press to bolt down, you can load long and carry the die and arbor press right to the bench to test seating depth on the spot, which cuts down on back-and-forth trips. For 300 Blackout, where bullet weights swing from light supersonic all the way to heavy 220-grain subsonic, that kind of flexibility is genuinely handy.
This is a chamber-type hand die, so it's designed to run with an arbor press or a soft-faced mallet rather than a conventional threaded press. An arbor press gives you the smoothest, most consistent results and is the preferred way to go. Many reloaders use the K&M Precision arbor press, which pairs well with Wilson inline dies.
The micrometer top lets you adjust seating depth in clean .001" increments with an easy-to-read scale, which makes dialing in and repeating a specific OAL much faster. If you adjust seating depth often or do a lot of load development, it's well worth it. If you only ever load one depth, you could get by without it, but the convenience is hard to beat.
The die comes with the standard seating stem, which handles most common bullet shapes used in 300 Blackout. If you're loading VLD or long-ogive match bullets, Wilson offers a separate VLD stem that contacts those profiles better and can improve seating consistency. For typical supersonic and subsonic loads, the standard stem does the job.
The Wilson chamber-type design holds the case stationary inside a chamber-shaped die body while the bullet is pressed straight down into the neck. That keeps the case and bullet in near-perfect alignment and removes the threads and sliding collars from the seating operation. The result is some of the lowest bullet runout available, which translates to more consistent, accurate ammo.
| UPC | 815145022547 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | S3-AAC |
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