The L.E. Wilson Steel Neck Sizer Die Bushing .328 is a hardened stainless steel component built for reloaders who demand precision neck sizing. Unlike generic bushings, Wilson manufactures these in .001" increments, giving you fine-grained control over how tightly your brass grips each bullet. This .328 bushing is sized to the middle of its bore, which is reamed with a .003" taper—a design that lets you dial in neck tension far more precisely than a single fixed die can achieve.
Neck tension directly affects velocity consistency, case life, and accuracy. The Wilson bushing approach solves a problem standard dies can't: if your brass hardens after multiple reloads and springs back too aggressively, or if you need to fine-tune squeeze without stepping down to the next smaller bushing, you can flip the bushing over (markings facing the case) for a slightly tighter sizing effect. It's a practical solution for brass that's been worked hard or when you're chasing that last fraction of a grain's worth of precision. Made to specs comparable to Redding neck bushings, the Wilson bushing will work in L.E. Wilson neck-sizer dies—but note that it is not compatible with Forster or RCBS dies.
Whether you're a long-range hunter refining loads or a competitive shooter managing case prep, this bushing gives you the control to maintain consistent neck tension across multiple firings. Simply measure your loaded round's neck diameter and subtract .002" to .003" to account for brass spring-back, or use the alternative method of measuring neck wall thickness, doubling it, adding bullet diameter, and subtracting .002" to .003". Either way, you'll land on the right bushing size for your exact setup.
Key Features
- Hardened stainless steel construction built for durability and consistency
- Manufactured in .001" increments for precise neck tension control
- Reversible design: flip bushing to achieve tighter sizing on hardened brass or for fine-tuning
- .003" taper bore reamed to specification for accurate centering
- Compatible with L.E. Wilson neck-sizer dies
Specifications
| Bushing Diameter (marked size) | .328" |
| Material | Hardened stainless steel |
| Bore Taper | .003" |
| Sizing Increment | .001" |
| Compatible Dies | L.E. Wilson neck-sizer dies only |
Frequently Asked Questions
Is the L.E. Wilson neck bushing compatible with my Redding or Forster die?
No. L.E. Wilson bushings are designed specifically for L.E. Wilson neck-sizer dies and will not work with Forster or RCBS dies. They are comparable in quality and design to Redding bushings, but not mechanically interchangeable across brands.
How do I know which bushing size to order?
Measure the outside diameter of your loaded, fired case neck and subtract .002" to .003" to account for brass spring-back. This remaining measurement is your target bushing size. Alternatively, measure your case neck wall thickness, double it, add your bullet diameter, then subtract .002" to .003". Both methods account for the small amount of outward spring that occurs after sizing.
What does it mean that the bushing is reversible?
The marked size refers to the middle of the bushing bore. Under normal use, the case neck only reaches this middle section. If your brass has hardened over time and springs back more aggressively, you can flip the bushing so the markings face toward the case (markings down) to achieve slightly tighter sizing without changing bushings. This emergency adjustment helps you maintain proper neck tension on work-hardened brass.
How does a neck bushing improve my reloading?
A neck bushing lets you control exactly how much force your die applies to the case neck, controlling how tightly it grips the bullet. This precision over neck tension improves velocity consistency, extends case life, and enhances accuracy—especially important for long-range hunting and competitive shooting where tight velocity spreads matter.
