
Availability: In Stock
The Weatherby BRASS303 30-378 Weatherby Magnum unprimed rifle brass gives handloaders a reliable foundation for building premium ammunition. If you're reloading for a big-game hunting rifle, long-range target work, or any application that demands the power of a 30-378 Wthby Mag, starting with quality brass matters—it directly affects accuracy, consistency, and case longevity across multiple reloads.
Each box contains 20 unprimed cases manufactured with CNC-machined primer pockets and held to strict grade specifications. The manufacturing process, which includes annealing for flexibility and durability, ensures the brass will expand and contract reliably under pressure and hold your bullet securely in place. You may notice a slight discoloration near the neck on some cases—this is a normal byproduct of the annealing process and does not affect performance.
Before you start reloading, these cases should be sized, deburred, and chamfered to prepare them for priming and loading. The manufacturing and shipping process can leave the case mouths slightly out of round, so proper prep work is essential for consistent, safe ammunition. With quality Weatherby brass in your reloading bench, you'll have the consistency and reliability hunters and precision shooters demand from a magnum cartridge.
| Cartridge | 30-378 Weatherby Magnum |
| Quantity | 20 cases per box |
| Primer Pocket | CNC-machined |
| Condition | Unprimed |
| Annealing | Yes |
Yes. Before loading, the cases should be sized, deburred, and chamfered. The manufacturing process can leave the case mouths slightly out of round, and proper prep ensures consistency and safety.
That's a normal result of the annealing process, which heats and cools the brass to improve its flexibility and durability. It does not affect performance or reliability.
We cannot specify a reload count—that depends on your reloading practices, powder selection, bullet weight, and other variables. Consult your reloading manual and manufacturer guidance for safe procedures.
Each box contains 20 unprimed 30-378 Weatherby Magnum brass cases, ready for sizing, deburring, chamfering, and loading.

SKU: 115766689 • Width: 3.8in • Height: 1.3in • Depth: 6.3in • Weight: 1.05oz





Availability: In Stock
The Weatherby BRASS303 30-378 Weatherby Magnum unprimed rifle brass gives handloaders a reliable foundation for building premium ammunition. If you're reloading for a big-game hunting rifle, long-range target work, or any application that demands the power of a 30-378 Wthby Mag, starting with quality brass matters—it directly affects accuracy, consistency, and case longevity across multiple reloads.
Each box contains 20 unprimed cases manufactured with CNC-machined primer pockets and held to strict grade specifications. The manufacturing process, which includes annealing for flexibility and durability, ensures the brass will expand and contract reliably under pressure and hold your bullet securely in place. You may notice a slight discoloration near the neck on some cases—this is a normal byproduct of the annealing process and does not affect performance.
Before you start reloading, these cases should be sized, deburred, and chamfered to prepare them for priming and loading. The manufacturing and shipping process can leave the case mouths slightly out of round, so proper prep work is essential for consistent, safe ammunition. With quality Weatherby brass in your reloading bench, you'll have the consistency and reliability hunters and precision shooters demand from a magnum cartridge.
| Cartridge | 30-378 Weatherby Magnum |
| Quantity | 20 cases per box |
| Primer Pocket | CNC-machined |
| Condition | Unprimed |
| Annealing | Yes |
Yes. Before loading, the cases should be sized, deburred, and chamfered. The manufacturing process can leave the case mouths slightly out of round, and proper prep ensures consistency and safety.
That's a normal result of the annealing process, which heats and cools the brass to improve its flexibility and durability. It does not affect performance or reliability.
We cannot specify a reload count—that depends on your reloading practices, powder selection, bullet weight, and other variables. Consult your reloading manual and manufacturer guidance for safe procedures.
Each box contains 20 unprimed 30-378 Weatherby Magnum brass cases, ready for sizing, deburring, chamfering, and loading.

SKU: 115766689 • Width: 3.8in • Height: 1.3in • Depth: 6.3in • Weight: 1.05oz