
Availability: In Stock
The L.E. Wilson 300 Remington Ultra Magnum fired case holder is a precision reloading tool designed to secure neck-sized rifle brass during the critical work of case trimming, primer pocket reaming, neck reaming, and deburring. If you're running a dedicated .300 RUM rifle and loading your own ammunition, this case holder locks your fired brass in place with the same support geometry as your rifle's chamber—eliminating wobble and ensuring uniform results shot after shot. Wilson's case holders are machined to tight tolerances so that repeatability isn't left to chance.
The fired-case version is calibrated specifically for neck-sized brass that has already been fired through your chamber. This matters: the holder's internal dimensions account for the slight dimensional change that occurs after firing, so your brass seats consistently and securely. Whether you're refining neck tension, managing case length, or preparing primer pockets, that unwavering support is the foundation of quality ammunition and reliable chronograph data.
Wilson case holders pair seamlessly with Wilson case trimmers and reaming tools, making them a natural anchor point in any well-organized reloading bench. Serious handloaders who demand uniformity—whether they're chasing tight groups at the range or building ammo for a long-range hunt—understand that case preparation is where precision starts.
| Caliber | 300 Remington Ultra Magnum |
| Case Type | Fired (neck-sized) |
| Manufacturer | L.E. Wilson |
| Application | Case trimming, primer pocket reaming, neck reaming, deburring |
No. This is a fired case holder, designed specifically for neck-sized brass that has been fired through your rifle. If you need to work with new or full-length sized brass, you would need L.E. Wilson's new case holder version instead.
The case holder is designed to support your brass during case trimming, primer pocket reaming, neck reaming, and deburring. It keeps your case steady and centered so these critical prep steps yield uniform results.
The case holder is built to pair with L.E. Wilson case trimmers and reaming tools. Check compatibility with specific Wilson products to confirm your setup.
A case holder that mirrors your rifle's chamber geometry eliminates wobble and ensures your brass seats in exactly the same position every time. That consistency during case prep translates to more uniform ammunition and tighter groups.

SKU: 197557935 • Weight: 0.25oz





Availability: In Stock
The L.E. Wilson 300 Remington Ultra Magnum fired case holder is a precision reloading tool designed to secure neck-sized rifle brass during the critical work of case trimming, primer pocket reaming, neck reaming, and deburring. If you're running a dedicated .300 RUM rifle and loading your own ammunition, this case holder locks your fired brass in place with the same support geometry as your rifle's chamber—eliminating wobble and ensuring uniform results shot after shot. Wilson's case holders are machined to tight tolerances so that repeatability isn't left to chance.
The fired-case version is calibrated specifically for neck-sized brass that has already been fired through your chamber. This matters: the holder's internal dimensions account for the slight dimensional change that occurs after firing, so your brass seats consistently and securely. Whether you're refining neck tension, managing case length, or preparing primer pockets, that unwavering support is the foundation of quality ammunition and reliable chronograph data.
Wilson case holders pair seamlessly with Wilson case trimmers and reaming tools, making them a natural anchor point in any well-organized reloading bench. Serious handloaders who demand uniformity—whether they're chasing tight groups at the range or building ammo for a long-range hunt—understand that case preparation is where precision starts.
| Caliber | 300 Remington Ultra Magnum |
| Case Type | Fired (neck-sized) |
| Manufacturer | L.E. Wilson |
| Application | Case trimming, primer pocket reaming, neck reaming, deburring |
No. This is a fired case holder, designed specifically for neck-sized brass that has been fired through your rifle. If you need to work with new or full-length sized brass, you would need L.E. Wilson's new case holder version instead.
The case holder is designed to support your brass during case trimming, primer pocket reaming, neck reaming, and deburring. It keeps your case steady and centered so these critical prep steps yield uniform results.
The case holder is built to pair with L.E. Wilson case trimmers and reaming tools. Check compatibility with specific Wilson products to confirm your setup.
A case holder that mirrors your rifle's chamber geometry eliminates wobble and ensures your brass seats in exactly the same position every time. That consistency during case prep translates to more uniform ammunition and tighter groups.
SKU: 197557935 • Weight: 0.25oz
