Description
Anyone who runs a lot of brass through full-length or neck sizing dies knows that case necks can thicken up over time. The L.E. Wilson Inside Neck Reamer in 6mm is the fix for that. Ground from hardened steel to a finish diameter of 0.2455 to 0.246 inches, it shaves the excess material from the inside of your 6mm case necks so you get consistent neck tension and clean chambering, batch after batch. It's a precise little tool built to the same standard you'd expect from everything that comes out of Wilson's shop.
How the 6mm Wilson Neck Reamer Earns Its Keep
Thick necks are more than a cosmetic issue. Too much material in the neck can bump up chamber pressures and throw your groups all over the place. This reamer removes that buildup so there's proper clearance between the loaded neck and the chamber. It's also a go-to when you're forming wildcats from a parent case, where necking down leaves you with extra brass that has to come out. The result is smoother seating and more predictable bullet grip.
Running the INR-060 on Your Wilson Case Trimmer
This reamer is designed to work with the L.E. Wilson Case Trimmer. You simply pull the trimmer cutter and drop the reamer in its place, then turn the handle to ream the neck. Because the stock reamer is ground a touch larger than bullet diameter, it's meant for fired, un-sized cases rather than brass that's already been run through a sizing die. The knob-style handle is included, so you've got what you need to get started right out of the box.
Built in the USA to Benchrest Standards
L.E. Wilson has been making precision reloading gear in Washington for generations, and this reamer carries that reputation. If your 6mm brass needs the necks brought back into spec, pair it with your Wilson trimmer setup and you'll have a reliable, repeatable way to keep your handloads consistent.
Key Specifications
- Manufacturer: L.E. Wilson
- Manufacturer Part Number: INR-060
- UPC: 815145023124
- Caliber: .243 / 6mm
- Finish Diameter: 0.2455" – 0.246"
- Material: Hardened Ground Steel
- Type: Inside Neck Reamer
- Compatibility: L.E. Wilson Case Trimmer
- Country of Origin: Made in USA
- Shipping Weight: 0.2 lbs
What’s Included
- One 6mm Inside Neck Reamer (INR-060)
- One knob-style handle
Frequently Asked Questions
What does the L.E. Wilson 6mm Inside Neck Reamer do?
It removes excess material from the inside of 6mm case necks so you get proper clearance between the loaded neck and the chamber. Thick necks can raise chamber pressures and hurt consistency, and this reamer brings them back to spec. It's also handy when forming wildcats from a parent case where necking down leaves extra brass to clean out.
Does this reamer fit the Wilson Case Trimmer?
Yes. The reamer is designed to replace the trimmer cutter in the L.E. Wilson Case Trimmer. You pull the cutter, drop the reamer in, and turn the handle to ream the neck. A knob-style handle is included with the reamer.
Should I ream before or after sizing my 6mm brass?
The stock INR-060 reamer is ground slightly larger than bullet diameter, so it's intended for use on fired, un-sized cases. Running it on as-fired brass gives you the cleanest, most consistent result. If you need a specialty size for sized brass, Wilson can grind custom reamers to order, though that extends lead time.
What are the dimensions of this 6mm reamer?
The INR-060 is ground from hardened steel to a finish diameter of 0.2455 to 0.246 inches, which corresponds to .243 caliber 6mm cases. That tolerance is what gives you a smooth, uniform inside neck surface and repeatable bullet tension across your brass.




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