The L.E. Wilson Steel Neck Sizer Die Bushing in .243 is a precision reloading component designed for reloaders who want tight control over neck tension and bullet fit. Unlike one-size-fits-all sizing dies, these hardened stainless steel bushings let you fine-tune how much the case neck grips your bullet—critical for consistent velocity, accuracy, and brass longevity. If you're working with .243 Winchester brass and want repeatable, match-grade results, a properly sized neck bushing is worth the effort.
L.E. Wilson manufactures these bushings in .001" increments, giving you granular control over sizing. The marked diameter on each bushing represents the middle section, which is reamed with a .003" taper—this taper matches the angle of the case neck as it enters the die, ensuring consistent contact and sizing. For standard applications, you'll use the bushing marked to your target size. If your brass has hardened and lost tension, or if you need to dial in a lighter squeeze than the next smaller bushing would provide, you can flip the bushing over (markings facing down toward the case) for a slight additional reduction in neck diameter. It's a handy tuning trick that can extend the life of work-hardened brass without stepping down to a different bushing.
These bushings are made to specs comparable to Redding neck bushings and will work in L.E. Wilson dies, but they are not compatible with Forster or RCBS die bodies. To select the right bushing, measure the outside diameter of a loaded round and subtract .002" to .003" to account for normal brass spring-back—or measure your case neck wall thickness, double it, add your bullet diameter, and subtract .002" to .003". Either method ensures proper neck tension for accuracy and reliable bullet retention.
Key Features
- Hardened stainless steel construction for durability and precision
- Made in .001" increments for fine-tuned neck sizing control
- .003" taper reamed into the bushing for consistent case-neck contact
- Reversible design: flip bushing over for lighter sizing in emergency or tuning situations
- Compatible with L.E. Wilson neck-sizing die bodies
- Ideal for precision rifle reloading and accuracy optimization
Specifications
| Manufacturer | L.E. Wilson |
| Caliber | .243 |
| Material | Hardened stainless steel |
| Taper | .003" |
| Sizing Increment | .001" |
| Compatibility | L.E. Wilson neck-sizing dies (not compatible with Forster or RCBS) |
Frequently Asked Questions
What die bodies are compatible with L.E. Wilson steel neck bushings?
These bushings work only with L.E. Wilson neck-sizing die bodies. They will not fit Forster or RCBS dies.
How do I choose the correct bushing size for my .243 brass?
Measure the outside diameter of a loaded cartridge and subtract .002" to .003" to account for brass spring-back. Alternatively, measure your case neck wall thickness, multiply by two, add your bullet diameter, and subtract .002" to .003". Either method gives you the target bushing size.
Can I use the bushing upside down for lighter sizing?
Yes. In normal use, the marked side faces away from the case. Flipping the bushing over (markings facing down) toward the case provides a slightly tighter sizing dimension—useful for hardened brass that has lost tension or for fine-tuning without stepping down to the next smaller bushing.
What is the .003" taper and why does it matter?
The taper is reamed into the middle section of the bushing to match the angle at which a case neck enters the die. This ensures consistent contact and even sizing pressure throughout the neck.
