
Availability: In Stock
The Lee 92378 Micrometer Full-Length Die Set for 300 Win Mag gives you the precision control serious reloaders demand when working up consistent, accurate ammunition. A micrometer die set puts repeatable case length and shoulder bump adjustments within a fraction of a thousandth of an inch—critical when you're loading for a magnum rifle and every tenth of grain and thousandth of an inch affects velocity, pressure, and group size downrange. Whether you're chasing sub-MOA loads for competition or building hunting rounds that shoot the same every time, this Lee die set delivers the fine-tuning capability that separates good ammunition from exceptional ammunition.
Lee's micrometer design lets you lock in your exact desired headspace and shoulder position, then repeat it with confidence across multiple loading sessions. That consistency is what turns a box of 20 rounds into something you can actually trust at distance. The 300 Win Mag is one of the most versatile long-range cartridges out there—whether you're pushing heavy bullets for elk or running a flat-shooting load for distance work, your ammunition quality sets the ceiling on what your rifle can deliver.
This is the kind of fundamental reloading gear that pays for itself in tighter groups and fewer fliers over the life of a serious shooting program. If you're handloading for precision rather than just volume, a micrometer die set is a smart upgrade from standard dies.
| Product | Lee 92378 Micrometer Full-Length Die Set |
| Caliber | 300 Winchester Magnum |
| Type | Full-Length Sizing Die Set with Micrometer |
| Manufacturer | Lee Precision |
This Lee micrometer die set is specifically designed for 300 Winchester Magnum ammunition.
The Lee 92378 is a full-length die set with micrometer adjustment capability, designed for precise sizing and headspace control.
The micrometer design allows for adjustments in increments of thousandths of an inch, giving you the fine-tuning control needed for precision handloading.
Yes. The micrometer adjustment feature makes this die set well-suited for reloaders pursuing the tightest tolerances and most consistent ammunition, including for long-range hunting and precision shooting applications.

SKU: 200189004 • Width: 4.9in • Height: 1.6in • Depth: 6.4in • Weight: 1.035oz





Availability: In Stock
The Lee 92378 Micrometer Full-Length Die Set for 300 Win Mag gives you the precision control serious reloaders demand when working up consistent, accurate ammunition. A micrometer die set puts repeatable case length and shoulder bump adjustments within a fraction of a thousandth of an inch—critical when you're loading for a magnum rifle and every tenth of grain and thousandth of an inch affects velocity, pressure, and group size downrange. Whether you're chasing sub-MOA loads for competition or building hunting rounds that shoot the same every time, this Lee die set delivers the fine-tuning capability that separates good ammunition from exceptional ammunition.
Lee's micrometer design lets you lock in your exact desired headspace and shoulder position, then repeat it with confidence across multiple loading sessions. That consistency is what turns a box of 20 rounds into something you can actually trust at distance. The 300 Win Mag is one of the most versatile long-range cartridges out there—whether you're pushing heavy bullets for elk or running a flat-shooting load for distance work, your ammunition quality sets the ceiling on what your rifle can deliver.
This is the kind of fundamental reloading gear that pays for itself in tighter groups and fewer fliers over the life of a serious shooting program. If you're handloading for precision rather than just volume, a micrometer die set is a smart upgrade from standard dies.
| Product | Lee 92378 Micrometer Full-Length Die Set |
| Caliber | 300 Winchester Magnum |
| Type | Full-Length Sizing Die Set with Micrometer |
| Manufacturer | Lee Precision |
This Lee micrometer die set is specifically designed for 300 Winchester Magnum ammunition.
The Lee 92378 is a full-length die set with micrometer adjustment capability, designed for precise sizing and headspace control.
The micrometer design allows for adjustments in increments of thousandths of an inch, giving you the fine-tuning control needed for precision handloading.
Yes. The micrometer adjustment feature makes this die set well-suited for reloaders pursuing the tightest tolerances and most consistent ammunition, including for long-range hunting and precision shooting applications.
SKU: 200189004 • Width: 4.9in • Height: 1.6in • Depth: 6.4in • Weight: 1.035oz
