The L.E. Wilson Steel Neck Sizer Die Bushing .324 is a precision reloading component for handloaders seeking tight, consistent neck sizing in their ammunition production. These hardened stainless steel bushings work with L.E. Wilson neck sizing dies to control bullet seating tension with repeatability that separates quality handloads from factory rounds. Whether you're fine-tuning match ammunition for competition or simply want reliable brass control across multiple loadings, a properly sized neck bushing is fundamental to consistent ballistics and case longevity.
L.E. Wilson manufactures these bushings in incremental steps of .001", allowing you to dial in exactly the amount of squeeze your brass and bullets need. The marked diameter (.324) represents the middle section of the bushing, which features a .003" taper. Since the case neck contacts only the center portion, you gain a clever tuning option: flip the bushing so the markings face the case to achieve slightly tighter sizing without stepping down to the next smaller bushing—a useful tactic when brass hardens after multiple firings and needs more tension to hold a bullet securely.
Installation and use are straightforward for anyone already running an L.E. Wilson neck sizing die. These bushings are not compatible with Forster or RCBS dies, so verify your die manufacturer before ordering. Selection is simple: measure your loaded cartridge's outside neck diameter and subtract .002" to .003" for proper spring-back, or calculate based on your case wall thickness, bullet diameter, and the same .002"–.003" deduction. Reloaders who understand the relationship between neck tension and consistency will appreciate the control this single component provides.
Key Features
- Hardened stainless steel construction for durability across hundreds of loadings
- Manufactured in .001" incremental sizes for precise neck tension control
- .003" taper design for consistent bullet grip
- Reversible for emergency fine-tuning of sizing when brass has hardened
- Compatible with L.E. Wilson neck sizing dies
Specifications
| Diameter Marking | .324" |
| Material | Hardened stainless steel |
| Taper | .003" |
| Increment Standard | .001" steps |
| Compatible Dies | L.E. Wilson neck sizing dies only |
Frequently Asked Questions
Is this bushing compatible with my Forster or RCBS neck sizing die?
No. L.E. Wilson bushings are designed specifically for L.E. Wilson neck sizing dies and will not interchange with Forster or RCBS equipment. Verify your die manufacturer before purchasing.
How do I select the correct bushing size for my ammunition?
Measure the outside neck diameter of a loaded round and subtract .002" to .003"—this accounts for brass spring-back and gives you proper bullet tension. Alternatively, measure your case neck wall thickness, multiply by two, add your bullet diameter, then subtract .002" to .003". The .324 bushing is one step in the available range; if your calculation falls between sizes, you can flip the bushing for a tighter fit without stepping to the next smaller diameter.
Can I use the bushing upside down for tighter sizing?
Yes. Rotating the bushing so the markings face the case (toward the shell holder) delivers slightly tighter sizing than normal orientation. This is useful when brass has hardened from multiple firings and needs extra tension to hold a bullet, or when you want to fine-tune without buying the next smaller bushing size.
What's the difference between the marked diameter and the actual sizing diameter?
The marked .324" refers to the middle section of the bushing, where the case neck actually contacts. The bushing features a .003" taper, which allows a smooth, consistent sizing action as the case enters and centers on the die.
