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After enough firings and sizings, brass necks tend to thicken up on the inside, and that extra material can crowd the chamber and throw off your consistency. The L.E. Wilson Inside Neck Reamer in .30 caliber is the fix. It shaves excess material evenly from the inside wall of the case neck so you keep proper clearance between the loaded neck and the chamber. This particular reamer carries a finished diameter of .311 to .3115 inches and is built from hardened, ground steel, which is why it holds a clean cutting edge over a lot of brass.
This is not a standalone tool. It is designed to drop into your Wilson case trimmer in place of the regular cutter assembly. Once it is seated, you turn the knurled knob clockwise and let the reamer do the work. Because the finished diameter runs a touch larger than bullet diameter, the stock sizing is meant for as-fired, un-sized brass. Running it on unsized cases is the way Wilson intends it to be used, and it is how you get the cleanest result.
The real-world jobs here are donuts, fat spots at the case mouth, and random thick areas that a chamfer tool simply cannot reach deep enough to handle. Reloaders who deal with donuts at the neck-shoulder junction tend to reach for this setup because it cleans things up and helps uniform neck tension in the process. It is also a handy piece when you are forming wildcats from a parent case, since reshaping brass often leaves behind uneven neck thickness that needs to be reamed back into spec.
L.E. Wilson has been a family-owned operation since 1927, and their case prep tools have a long reputation on precision benches. This reamer is made in the U.S.A. and machined to a tight, repeatable finish. Pair it with a pin gauge to measure your neck I.D. and confirm you have the right size, and you will get a smooth, known inside diameter every time.
It is made to run inside the Wilson case trimmer, installed in place of the regular cutter assembly. Once seated, you turn the knurled knob clockwise to ream the neck. It is not a standalone, hand-held cutting tool.
Wilson designs these reamers for fired, un-sized cases, so you want to run them on as-fired brass. The finished diameter runs slightly larger than bullet diameter for that reason. Reaming un-sized cases gives you the cleanest, most consistent inside neck.
That is the inside neck diameter the reamer leaves behind after cutting. It is sized for .30 caliber brass and leaves a smooth, known inside surface. Many reloaders use a matching pin gauge to confirm the neck I.D. and dial in neck tension.
Yes, clearing donuts and uneven buildup near the neck-shoulder junction is exactly what it is built for. It reaches deeper than a standard chamfer tool can, cleaning up case mouths, old donuts, and random fat areas. It also helps uniform neck tension in the process and is useful when forming wildcats from a parent case.
| UPC | 815145023025 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | INR-030 |
| Caliber/Gauge | .30 Caliber |
| Shipping Weight | 0.2 |
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