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Reloading the .257 Weatherby Magnum means starting with brass that can handle serious pressure and still shoot straight, and this Weatherby factory brass delivers exactly that. Each case is produced on Norma Precision brass, the same material Weatherby trusts for its loaded ammunition, and finished with CNC-machined primer pockets held to match-grade specifications. That consistency from case to case is what lets you chase tight groups and repeatable velocities once you dial in your load.
The .257 Weatherby Magnum is a belted magnum built by Roy Weatherby back in the 1940s by shortening and necking down the .375 H&H case, and it remains one of the flattest-shooting quarter-bore cartridges you can own. It also happens to run at high pressure, so your brass needs to be up to the task. Starting with purpose-built Weatherby brass takes the guesswork out of case uniformity and gives you a dependable platform for everything from fast 100-grain bullets to the heavier 115 and 120-grain pills that stretch this round's range.
These arrive unprimed and ready for your bench, so plan on the usual prep before loading: inspect, size, trim to length, then chamfer and deburr the case mouths. With a cartridge that generates this much pressure, a few habits pay off. Sizing to headspace off the shoulder rather than the belt, neck sizing after fireforming, and periodic annealing all help control stretching just ahead of the belt and extend how many firings you get out of each case. Keep an eye on the brass after several hot loads and you'll get plenty of use out of a box.
Whether you're loading for a Mark V, a Vanguard, or another rifle chambered in .257 Weatherby, quality brass is the one component you don't want to cut corners on. This is the real deal straight from Weatherby.
No, these cases ship unprimed and unloaded. Plan on standard case prep before loading, including inspecting, sizing, trimming to length, and chamfering and deburring the case mouths. Once prepped, they're ready for your primer, powder, and bullet of choice.
The cases are produced on Norma Precision brass, the same material Weatherby uses in its loaded factory ammunition. Each one features CNC-machined primer pockets held to match-grade specifications, which is a big part of why this brass is prized for consistent handloads.
Case life depends on how hot you load and how carefully you prep. Because this cartridge runs at high pressure, brass tends to stretch just ahead of the belt, so inspect closely for signs of case separation after several firings with maximum loads. Sizing off the shoulder, neck sizing after fireforming, and periodic annealing all help you get more firings out of each case.
These cases are made for any rifle chambered in .257 Weatherby Magnum, including the Weatherby Mark V and Vanguard lines. It's a belted magnum developed by Roy Weatherby and remains one of the flattest-shooting quarter-bore cartridges available, popular for long-range big game and varmint work.
| UPC | 747115070152 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BRASS257 |
| Caliber/Gauge | .257 Weatherby Magnum |
| Product Type | Unprimed Case |
| Quantity | 20 Per Box |
| Shipping Weight | 0.75 |
| Style | Magnum |
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