Weatherby BRASS653 Unprimed Cases6.5-300 Wthby Mag Rifle Brass 20 Per Box
If you're building custom loads for a 6.5-300 Weatherby Magnum, you need brass that matches the precision of your handloading. The Weatherby BRASS653 unprimed cases are purpose-built for the 6.5-300 WBY MAG, engineered to the tight tolerances that separate good handloads from match-grade ones. These are precision brass components—not generic surplus or once-fired mixed lots—designed specifically for reloaders who demand consistency across every round they assemble.
Weatherby's CNC-machined primer pockets are cut to match-grade specifications, meaning uniform pocket dimensions that promote consistent primer seating and reliable ignition. This level of consistency matters whether you're loading for a precision rifle competition, long-range hunting, or testing loads for a new build. The 20-count per box format is typical for magnum rifle brass, giving you enough to develop and test a load ladder without a massive initial commitment.
These are unprimed cases, so you'll supply your own large rifle magnum primers as part of your handloading process. That gives you complete control over primer selection based on your specific powders and velocities. Because these cases are Weatherby-branded and caliber-specific, they're already sized and formed for the 6.5-300 WBY MAG chamber—no fireforming required if you're loading for a rifle already chambered in this magnum.
Key Features
- CNC-machined primer pockets to match-grade tolerances for uniform ignition and reliability
- Precision brass manufactured specifically for 6.5-300 Weatherby Magnum
- 20 unprimed cases per box
- Sized and ready to load—no fireforming needed for dedicated 6.5-300 WBY MAG firearms
Specifications
| Caliber | 6.5-300 Weatherby Magnum |
| Priming Status | Unprimed |
| Quantity Per Box | 20 Cases |
| Manufacturer | Weatherby |
Frequently Asked Questions
Do I need to fireform these cases for my 6.5-300 Weatherby Magnum rifle?
No. These are Weatherby-manufactured brass already sized and formed for the 6.5-300 WBY MAG chamber, so they're ready to load without fireforming.
What primers do I need for the 6.5-300 WBY MAG?
These cases are unprimed, so you'll need to source large rifle magnum primers separately. Your choice of primer brand and type will depend on your specific powder selection and load data.
Are these reloadable multiple times?
Weatherby precision brass is designed for handloading, but the number of reloads you'll get depends on your load data, firing conditions, and inspection practices. Follow industry standards for case inspection and retirement.
Will these cases work in any 6.5-300 Weatherby Magnum rifle?
Yes, these are standard 6.5-300 WBY MAG brass, so they'll chamber and load in any rifle chambered for that caliber.

