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The 7mm Weatherby Magnum has always rewarded a careful handloader, and Peterson brass gives you a foundation worth building on. This 50-count box of unprimed cases is made by Peterson Cartridge, a family-owned Pittsburgh shop that builds brass and nothing else. That singular focus shows up where it counts: uniform wall thickness, consistent case weight, centered flash holes, and primer pockets that hold tight through multiple firings.
The 7mm Wby Mag is one of Roy Weatherby's original belted magnums, based on the Holland & Holland case necked down to .284 and given the signature double radius shoulder. It pushes a 140-grain bullet somewhere around 3,250 fps and handles heavier 160 and 175-grain pills for elk, bear, moose, and larger plains game. Most rifles chambered for it run a 1:10 twist, which stabilizes the full range of common 7mm bullets. Good brass is the quiet hero behind that performance, and it matters even more with a high-velocity magnum running near the top of the pressure chart.
Every case goes through both automated and hand inspection before it ships, so you get tight lot-to-lot consistency that translates into lower velocity spread and tighter groups. The uniform case capacity and hard, well-formed heads also mean you can expect more reloads per case than a lot of what's out there. For anyone chasing repeatable accuracy out of a belted magnum, that consistency is the difference between a load that prints and one that wanders.
These cases arrive deburred and ready to load, though like any new brass a quick check of length and a light chamfer never hurts before your first firing. Since this is a high-capacity magnum case, slow to very slow burning powders are the way to go, and the belt gives you a solid headspace reference for consistent fire-forming and sizing. Pair it with quality primers and bullets, keep your charges within published data, and this brass will carry a serious load across many firings.
These cases ship unprimed, so you'll supply your own large rifle primers, powder, and bullets. They arrive deburred with centered flash holes and ready to load, though a quick measure and light chamfer before the first firing is always smart practice. From there you're set to build your load.
This listing is a box of 50 unprimed cases packaged in Peterson's plastic ammo box. It's a practical count whether you're working up a new load or restocking for a season of range and hunting work.
The 7mm Weatherby Magnum takes a large rifle primer. Because it's a high-capacity magnum case, many handloaders reach for magnum large rifle primers with slow-burning powders for the most consistent ignition. Always follow published load data for your chosen components.
Yes. Peterson builds match-grade cases with uniform wall thickness, consistent weight, and hard, well-formed heads that hold primer pockets tight through repeated firings. That generally means more reloads per case than average brass, which is a real advantage when you're feeding a hard-working magnum.
| UPC | 810068270327 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 40065-R |
| Shipping Weight | 2.3 |
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