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The 30-378 Weatherby Magnum is one of the biggest commercially available .30 calibers, and loading for a case this size means your components have to be right from the start. These Weatherby Select Plus unprimed cases give you exactly that: clean, correctly dimensioned brass built specifically for the 30-378, ready to prep, prime, and load with the powder charge of your choice. These are new, unprimed cases with no powder or projectiles, so the rest of the recipe is up to you.
Weatherby's brass is produced by Norma, a name that reloaders tend to trust when they want consistency. The cases feature CNC-machined primer pockets held to match-grade specifications, which matters a lot on a high-capacity magnum where uniform ignition and tight tolerances help tame velocity spread. For a cartridge that was originally built around benchrest-level accuracy, starting with properly made brass makes the whole load development process smoother.
This cartridge was created by necking down the .378 Weatherby Magnum to accept a .308 bullet, and it runs on seriously slow-burning powders to fill that big belted case. Handloaders working with the 30-378 commonly reach for powders like Retumbo, H1000, and other slow burners paired with heavy 180 to 215 grain .30 caliber bullets. Weatherby rifles are known for generous freebore and long throats, so many folks seat their bullets out as far as the magazine will allow when chasing accuracy. As always, start low and work up using published load data for this specific cartridge.
Because the 30-378 runs so much powder at high pressure, this is a case that rewards careful prep and attentive reloading. Keep an eye on your primer pockets and trim to length as needed so you get the most out of every piece. Treat it right and this Select Plus brass gives you a reliable base for one of the hardest-hitting thirties around.
No, these are new unprimed cases, not loaded ammunition. They contain no primer, powder, or bullet. You will need to prime, charge, and seat your own components before they are ready to fire.
Weatherby brass is produced by Norma, a well-regarded European manufacturer that has made components for Weatherby for decades. The Select Plus line features CNC-machined primer pockets held to match-grade specifications. It is the same quality Weatherby owners count on for their factory ammunition.
The 30-378 has a huge case and needs very slow-burning powders to perform well. Handloaders frequently have success with options like Retumbo and H1000 behind heavy .30 caliber bullets in the 180 to 215 grain range. Always start low and work up using current published load data for this cartridge.
A little case prep goes a long way with any magnum brass. Check case length and trim as needed, chamfer and deburr the necks, and inspect primer pockets before your first load. Because the 30-378 operates at high pressure with a large powder charge, attentive prep helps you get the best accuracy and the most useful life out of each case.
| UPC | 747115433902 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BRASS303CT50 |
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