Precision neck sizing starts with the right bushing. The L.E. Wilson Steel Neck Sizer Die Bushing in .258 is a hardened stainless steel component engineered for reloaders who demand consistent case neck tension and tight concentricity. Wilson neck bushings are manufactured in .001" increments, giving you granular control over how much your brass springs back after sizing—critical for accuracy and brass longevity. Whether you're fine-tuning loads for a precision rifle or working with brass that's hardened from multiple loadings, this bushing lets you dial in exactly the neck tension your ammunition needs.
The marked size on this bushing refers to the middle diameter, which is reamed with a .003" taper. The bushing can be flipped over (markings facing down) to achieve slightly tighter sizing when needed—a useful trick when brass has hardened and lost case neck grip, or when you want finer control over squeeze than stepping down to the next smaller bushing would provide. Built to specs comparable to Redding neck bushings, the Wilson design fits L.E. Wilson dies; it will not work with Forster or RCBS die systems.
Selecting the right size is straightforward. Measure your loaded cartridge's outside neck diameter and subtract .002" to .003" to account for brass springback, or use the two-measurement method: multiply your case neck wall thickness by two, add your bullet diameter, then subtract .002" to .003". Either approach gives you the bushing size needed for proper neck tension and reliable bullet hold without excessive force.
Key Features
- Hardened stainless steel construction for durability and consistency
- Manufactured in .001" increments for precise sizing control
- Reamed middle section with .003" taper for controlled case neck fit
- Reversible design allows tighter sizing when turned over for hardened brass or fine-tuning
- Compatible with L.E. Wilson reloading dies only
Specifications
| Brand | L.E. Wilson |
| Product Type | Neck Sizer Die Bushing |
| Caliber/Size | .258 |
| Material | Hardened Stainless Steel |
| Sizing Increment | .001" |
| Taper | .003" |
| Compatibility | L.E. Wilson dies (not compatible with Forster or RCBS dies) |
Frequently Asked Questions
What size bushing do I need for my .258 cartridge?
Measure the outside neck diameter of your loaded cartridge and subtract .002" to .003" to allow for brass springback. Alternatively, measure your case neck wall thickness, multiply by two, add your bullet diameter, and subtract .002" to .003". This second method gives you a more precise target size.
Can I use this bushing with my Forster or RCBS die set?
No. The L.E. Wilson Steel Neck Sizer Die Bushing is designed exclusively for L.E. Wilson reloading dies and will not fit Forster or RCBS systems.
What's the benefit of flipping the bushing over?
Reversing the bushing (markings facing down toward the case) allows you to achieve slightly tighter sizing without stepping down to the next smaller bushing size. This is useful for fine-tuning neck tension on work-hardened brass or when you need more precise control over the squeeze applied to your bullet.
How does the .003" taper work?
The bushing middle section is reamed with a .003" taper, which means the diameter changes gradually. Since your case neck only reaches the middle of the bushing during sizing, this taper design allows controlled, consistent neck sizing with predictable springback.
