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The L.E. Wilson Micrometer Top Bullet Seater for 300 WSSM is one of those tools that reloaders chasing tight groups tend to swear by. It's an inline, chamber-type seater machined from a solid bar of high-grade stainless steel, and the whole idea behind it is simplicity. There's only one moving part during the seating operation, which means fewer places for error to creep in. The case and bullet get captured inside a chamber cut to match the 300 WSSM, then the seating stem pushes the bullet straight down. Everything stays aligned the entire way, and that's what gives you the concentricity that shows up on paper at distance.
The micrometer top is the headliner here. It adjusts seating depth in clean .001" increments with an easy-to-read scale, and you can dial even finer than that if you want to split hairs. Because it indexes to actual numbers, you can bounce back and forth between seating depths for different loads or different rifles and return to a known setting every time. Major adjustments are handled through the 3/8"-24 TPI threads in the cap, so you've got range at both ends of the spectrum. The seating stem and the bore guide hole are machined to extremely tight tolerances, and the fit is snug enough that you can feel the bullet come into perfect alignment as it seats.
This is a hand die built to run on an arbor press, not a conventional threaded press. That design is a feature, not a limitation. You get real tactile feedback through the whole seating stroke, and because the setup is compact, plenty of folks pack the press and die out to the range to test seating depth in real time. That saves you from loading at home, driving out, and driving back just to try one more adjustment. The die ships with the standard seating stem, which handles most conventional bullet shapes well. Fit, finish, and repeatability are the hallmarks Wilson has built its reputation on, and this seater carries that tradition. Made in the U.S.A.
No, this is a hand die designed to run on an arbor press. It's built to be used with a mallet or, more commonly, an arbor press, and it isn't made for a conventional threaded press. Many reloaders pair it with a dedicated arbor press setup so they can seat bullets right at the range.
The micrometer top lets you adjust seating depth in precise .001" increments using an easy-to-read scale, and you can dial even finer if you choose. Because it references real numbers, you can move between different seating depths for various loads or rifles and come back to an exact setting. Larger adjustments are made through the 3/8"-24 threads in the cap.
A chamber-type seater captures both the case and bullet inside a chamber cut to match the 300 WSSM before the seating stem pushes the bullet straight down. Everything is held in alignment during the entire operation, which reduces runout and gives you more consistent concentricity. That consistency is what shows up as tighter groups downrange.
It ships with the standard seating stem, which covers most conventional bullet shapes nicely. If you're loading VLD or long, secant-ogive match bullets, a VLD seating stem is available separately. For most 300 WSSM loads the standard stem does the job well.
| UPC | 815145022561 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | S30-WSSM |
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