Peterson 40003-R 300 Wby 50/10

Peterson Cartridge 300 Weatherby Magnum brass is engineered for reloaders who demand consistency shot after shot. The 40003-R 50/10 package gives you 50 pieces of unprimed rifle brass—ideal for building a matched ammunition lot for hunting, competition, or precision range work. Peterson's match-grade brass is produced in small batches with rigorous quality oversight, so every case meets the same exacting standard from the loading bench to the target.

If you're working with a 300 Weatherby Magnum rifle, this brass forms the foundation of reliable, repeatable handloads. Match-grade consistency means tighter velocities, more predictable trajectories, and better group density—especially important when you're dialing in loads for long-range hunting or pushing precision at the range. Peterson's attention to the entire manufacturing pipeline translates to casings that perform uniformly through multiple reloading cycles.

The 50-case quantity is a practical size for testing loads, building a new lot, or topping off your reloading inventory without overcommitting to a larger quantity. Whether you're a dedicated handloader seeking premium brass or a hunter refining ammunition for your magnum, Peterson's match-grade standard delivers the consistency you need to shoot your best.

Specifications

Frequently Asked Questions

What's included in the 50/10 package?

The 40003-R contains 50 unprimed rifle brass cases in 300 Weatherby Magnum. You supply the primers, powder, and bullets for reloading.

Is this brass suitable for match-grade reloading?

Yes. Peterson Cartridge produces this brass under match-grade manufacturing standards, with small-batch production and quality control designed to ensure consistency for precision handloading and accuracy-focused shooting.

Can I reload this brass multiple times?

Peterson brass is manufactured for durability through multiple reloading cycles, though exact longevity depends on your load data and reloading practices. Always inspect brass before each reload for signs of wear or damage.

Who should use 300 Weatherby Magnum brass?

Reloaders with 300 Weatherby Magnum rifles, including long-range hunters, precision shooters, and competitors seeking consistent ammunition tailored to their specific rifle and load requirements.