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The 6.5-300 Weatherby Magnum is one of the fastest 6.5mm cartridges you can feed a rifle, and that kind of performance demands brass that can keep up. Peterson Cartridge delivers exactly that. This is match-grade, American-made rifle brass engineered around the needs of long-distance shooters who care about every foot per second and every little bit of consistency on paper. If you own a Mark V chambered in this caliber and you're tired of fighting for correctly headstamped cases, this is the brass worth building your loads around.
Peterson doesn't dabble in other components. The entire facility, machinery, and lab are dedicated to producing brass rifle casings and nothing else, and that specialization shows up in the finished product. Each case runs through a closely monitored manufacturing process built to hold tight wall thickness, consistent internal volume, and solid case head hardness. The practical payoff is longer primer pocket life, cleaner ignition, and tighter velocity spreads, all of which matter a lot when you're stretching this cartridge out to distance.
The 6.5-300 Weatherby is a belted magnum with a double radius shoulder and tolerances that are roughly half those of other belted magnums, which made it a genuine challenge to produce. Peterson engineered dedicated tooling to get it right, and the result is brass they put through their full battery of tests and quality checks before it ever ships. Roy Weatherby built this round for flat-shooting, high-velocity performance, and these casings are designed to handle those high-pressure loads.
This is unprimed, ready-to-load brass with no fireforming required to get started. Give each case a quick inspection, uniform the necks and trim to your spec, and you're set to work up loads. A lot of reloaders find Peterson brass needs less prep out of the gate than they're used to, which gets you to the range faster and your groups tighter sooner.
No, these are unprimed casings ready for your own primer, powder, and bullet. That gives you full control over your load development from the ground up. Just inspect and prep the cases to your preference before loading.
No fireforming is required to get started with Peterson brass. It's made to be ready-to-load, so a basic inspection and your normal case prep steps are all you need. Many reloaders find it takes less prep out of the box than other brass they've used.
Peterson dedicates its entire operation to brass rifle casings alone, which translates to tight tolerances, consistent case volume, and a hardened case head. For a fast, overbore cartridge like the 6.5-300 Weatherby, that consistency helps with longer primer pocket life and lower velocity spreads. It's a strong choice if you're chasing precision at distance.
The bulk package ships without Peterson's plastic ammo boxes, which keeps the cost per case down. The brass itself is the same match-grade quality you'd get in the boxed version. It's a practical option if you shoot this caliber often and go through brass in volume.
| UPC | 850005375913 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 40059-P |
| Length | 10" |
| Quantity | 250 CT |
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