L.E. Wilson 338 Caliber (0.3405''-0.341'') Inside Neck Reamer
$40.48
The L.E. Wilson 338 caliber inside neck reamer (0.3405"-0.341") is a precision case-preparation tool built for handloaders who demand consistent chamber fit and reliable pressure curves. Thick case necks are a common culprit behind high chamber pressures, velocity spread, and unpredictable accuracy—especially in precision rifle loads. This reamer addresses that problem by carefully removing excess neck material, ensuring your loaded rounds have proper clearance in the chamber and perform the way you intended on the range or in the field.
Wilson neck reamers are sized to work on fired, unsized cases, running approximately 0.0025" to 0.003" larger than bullet diameter. That sizing strikes a practical balance: you get a reamer that handles most fired brass without custom grinding, while still delivering the neck-turning results serious handloaders expect. The tool mounts directly into a Wilson case trimmer in place of the standard cutter, so if you're already running a Wilson trimmer, adding this reamer to your bench is straightforward.
These reamers also earn their place in wildcat rifle development. When forming custom cartridges from a parent case, an inside neck reamer lets you dial in the neck dimensions you need for your specific chamber and bullet combination. For hunters and long-range shooters building match-grade ammunition, that level of control over case prep makes a real difference in shot-to-shot consistency and downrange performance.
Key Features
- Designed for .338 caliber cases with sizing of 0.3405" to 0.341"
- Removes excess neck material to restore proper chamber clearance
- Mounts in L.E. Wilson case trimmer (replaces standard cutter)
- Calibrated for fired, unsized brass
- Supports wildcat cartridge forming and custom case prep
Specifications
| Caliber | .338 |
| Neck Diameter Range | 0.3405" – 0.341" |
| Reamer Type | Inside Neck |
| Recommended Use | Fired, unsized cases |
| Sizing Offset | 0.0025" – 0.003" larger than bullet diameter |
| Application | L.E. Wilson Case Trimmer |
Frequently Asked Questions
Will this reamer work with my L.E. Wilson trimmer?
Yes. The Wilson inside neck reamer installs directly into your Wilson case trimmer as a drop-in replacement for the standard trimmer cutter.
What cases does this reamer fit?
This reamer is designed for .338 caliber cases with neck diameters between 0.3405" and 0.341". It's calibrated for fired, unsized brass.
Can I use this for wildcat cartridge development?
Yes. Neck reamers are commonly used when forming wildcat cartridges from a parent case, allowing you to prep neck dimensions for custom chambers and bullet combinations.
How much material does this reamer remove?
The reamer is sized approximately 0.0025" to 0.003" larger than bullet diameter, removing excess neck material to ensure adequate clearance between the case neck and chamber.
