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Brass necks don't stay the same forever. After several firings and resizings, material tends to flow forward and build up inside the case neck, which can tighten chamber clearance and throw off how your rounds release. The L.E. Wilson 270 Caliber Inside Neck Reamer is built to deal with exactly that on your .277 caliber brass, shaving that excess material off the inside neck wall so your cases behave the way they're supposed to.
This is a .2795 to .280 finished diameter reamer with the part number INR-270, cut to run slightly larger than bullet diameter so it's meant for as-fired, un-sized brass. It removes metal evenly from the neck walls and resets your cases closer to factory wall thickness. Worth knowing up front: this is a material removal tool, not a neck uniformer, so it won't correct necks that are thicker on one side than the other. What it does well is pull out that build-up and raised areas that would otherwise get shoved to the outside of the neck during seating.
The reamer is designed to drop into the Wilson case trimmer in place of the standard cutter. The trimmer acts as a jig, keeping the case and reamer aligned and giving you solid support while you work. You bump the case into the holder like you would for trimming, set it on the rails, and turn the reamer in and out of the mouth in one smooth motion. The bearing portion is purposely short and ground slightly undersize to give it a bit of universal-joint float, letting the cutting end self-align with the case mouth.
This tool earns its keep on brass that's been fired with full-power loads and fully expanded to chamber diameter, especially cases you've loaded many times or necks showing donut build-up. It's also a handy helper when forming wildcat cases from a parent cartridge. Once you've reamed, chamfer and deburr the case mouths before loading. It's made in the U.S.A., like the rest of the Wilson lineup, and it's the kind of precision tool handloaders chasing tight, repeatable results tend to appreciate.
It removes excess material that builds up on the inside of the case neck after repeated firings and resizings. This resets the neck closer to factory wall thickness so there's adequate clearance between the neck and your chamber. Keep in mind it's a material removal tool and not a neck uniformer, so it won't fix necks that are uneven in thickness from side to side.
Yes. The reamer is designed to be installed in the Wilson case trimmer in place of the standard cutter, and the trimmer acts as a jig to keep the case and reamer aligned during the job. Running it in the trimmer gives you the support and alignment that makes the cut clean and consistent.
Standard reamers like this one are sized for use on fired, un-sized brass, since the tool runs slightly larger than bullet diameter. It works best on cases fired with full-power loads that have fully expanded to chamber diameter. After reaming, chamfer and deburr the case mouths before loading.
It can. These reamers are often used when forming wildcat cartridges from a parent case, in addition to cleaning up thick necks on standard .277 brass. For forming work with necks sized down from another caliber, Wilson notes that special sizes are sometimes needed, so it's worth matching the tool to your exact job.
| UPC | 815145023018 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | INR-270 |
| Caliber/Gauge | .270/6.8 mm (.277) |
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