PETERSON 40015-R 300 WIN MAG 50/10

Peterson Cartridge's 300 WIN MAG brass is built for serious long-range shooters and magnum rifle handloaders who demand consistency. This 50-count box of rifle reloading brass gives you a foundation for precision loads with the .300 Winchester Magnum, a magnum cartridge trusted by hunters pushing distance and precision shooters running tighter groups at the range. Peterson brass is annealed and factory-cleaned before it ships, so you're starting with cases ready to load without extra prep work.

The .300 Winchester Magnum's belted design handles the velocity and pressure needed for heavy .30-caliber bullets—from moderate 165-grain hunting rounds to full-power 230-grain target and long-range loads. Whether you're developing loads for a bolt-action hunting rifle or dialing in a competition setup, Peterson's quality brass holds concentricity and dimensional consistency through multiple reloads, which matters when you're chasing repeatability.

Each box ships in a protective plastic ammo box, so your brass arrives clean and stays organized in your loading bench or field kit. Peterson's no-nonsense approach to brass manufacturing—good metallurgy, careful processing, no gimmicks—makes this a solid choice for anyone who reloads their own magnum ammunition and values consistency without the premium price tag.

Key Features

• 50 pieces of annealed, factory-cleaned .300 Winchester Magnum rifle brass
• Belted magnum case design for high-pressure magnum rifle loads
• Compatible with .30-caliber bullets from 165 grains to 230 grains
• Shipped in protective plastic ammo box for safe storage and transport
• Consistent dimensions and concentricity across the lot for reliable reloading

Specifications

Frequently Asked Questions

What caliber rifles can I load this brass for?

Peterson 40015-R brass is designed for .300 Winchester Magnum rifles. If your rifle is chambered in .300 WIN MAG, this brass will work with your firearm.

What bullet weights can I load in .300 WIN MAG Peterson brass?

This brass is designed to handle .30-caliber bullets ranging from 165 grains up to 230 grains, giving you flexibility for hunting, target, and long-range loads.

Do I need to anneal or clean this brass before loading?

No. Peterson ships this brass already annealed and factory-cleaned, so you can begin loading immediately without additional preparation.

What's included in the 50/10 package?

The box contains 50 cases of .300 Winchester Magnum brass, packaged in a protective plastic ammo box suitable for storage and transport.