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The L.E. Wilson .329 steel neck sizing bushing is one of those small parts that makes a real difference once you start chasing tighter groups. It lets you size only the case neck to the exact diameter you need, giving you control over neck tension without leaning on an expander ball. Less brass working means longer case life and more consistent bullet seating round after round.
This bushing drops straight into Wilson bushing-type neck sizing dies and the Wilson full length bushing dies, but it isn't locked to just one brand. It also works in Redding, Hornady, and RCBS bushing dies, so odds are good it'll slide right into the setup you're already running. The .329 size is part of Wilson's lineup made in .001 inch increments, which is why reloaders can get so precise with their neck tension.
Sizing bushings all come down to the math on your specific brass and bullet combo. The common approach is to measure the outside neck diameter of a loaded cartridge and subtract .002 to .003 inch, which leaves about .001 inch of spring back for proper grip on the bullet. You can also measure neck wall thickness, multiply by two, add your bullet diameter, then subtract that same .002 to .003 inch. Keep in mind different brands of brass carry different wall thickness, so you may land on a different bushing depending on what you're loading.
L.E. Wilson has been building reloading tools for decades, and these bushings get the same attention. Each one is made from hardened tool steel and goes through a multistep process to hold its dimensions, so it'll stay true through years of loading sessions. Since it's a steel bushing, a little case lube on the necks keeps things smooth and your brass happy.
This bushing is made for Wilson bushing-type neck sizing dies and Wilson full length bushing dies. It also works in Redding, Hornady, and RCBS bushing dies. It will not fit Forster dies, so check your die brand before ordering.
Measure the outside neck diameter of a loaded cartridge and subtract .002 to .003 inch, which leaves roughly .001 inch of spring back for proper neck tension. You can also measure your neck wall thickness, multiply by two, add your bullet diameter, then subtract .002 to .003 inch. Since brass wall thickness varies by brand, it's worth confirming the numbers for your specific cases.
Yes, a light coat of case lube on the necks is recommended with steel bushings. It keeps the sizing smooth and helps protect your brass and the bushing over time.
You can. The marked size refers to the middle of the bushing, which is reamed with a slight taper. Flipping the bushing so the markings face down toward the case can give you a touch more sizing from the same bushing.
| UPC | 815145025197 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | B-329 |
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