Weatherby 338-378 Weatherby Magnum Unprimed Rifle Brass, 20-Count

Weatherby 338-378 Weatherby Magnum Unprimed Rifle Brass (brand part no. BRASS333) supplies a 20-count box of match-grade cases for handloaders chasing the flat-shooting velocity this magnum cartridge is known for. Weatherby brass features Norma Precision Brass and CNC-machined primer pockets produced to match-grade specifications, so every case seats and fires consistently. It’s the right pickup for hunters and long-range shooters loading their own 338-378 Weatherby Magnum ammunition for serious performance.

Key Specifications

• Chambered for 338-378 Weatherby Magnum, matching factory case dimensions for this Weatherby magnum cartridge.
• Packaged 20-Count, a practical batch size for load development.
• Classified as an Unprimed Case, giving handloaders full control over primer selection.
• Features CNC-machined primer pockets produced to match-grade specifications for consistent ignition.
• Built to Magnum-rated case dimensions to handle Weatherby’s high-velocity pressures.
• Ships at approximately 1.0 lb per box, useful for planning bulk brass orders.

Frequently Asked Questions

What caliber is this brass? It is 338-378 Weatherby Magnum brass, sized for rifle reloading.

Does it come with primers installed? No, these cases are unprimed so you can seat the primer of your choice.

How many cases are in a box? Each box contains 20-count.

Buy the Weatherby 338-378 Weatherby Magnum Unprimed Rifle Brass

Build match-grade 338-378 Weatherby Magnum handloads with genuine Weatherby brass. Order from our reloading brass lineup at Weatherby and Schaefer Defense will ship it fast, direct to your door from our Lubbock, Texas gun shop.