Winchester Ammo WSC303BU Unprimed Cases303 British Rifle Brass 50 Per Bag

Winchester Unprimed Cases in .303 British are a reliable foundation for handloaders committed to precision rifle ammunition. These .303 British rifle brass cases come 50 per bag and are sold unprimed, giving you complete control over primer selection and allowing you to tailor each round to your specific rifle and shooting application. Whether you're building ammunition for a vintage Enfield, a modern .303 British sporting rifle, or a custom build, Winchester brass offers the consistency and quality reloaders have depended on for decades.

Reloaders choose Winchester .303 British brass for its straightforward dimensions and reliable performance across multiple loadings. Unprimed cases let you work at your own pace and choose primers that match your powders, bullets, and intended use—whether that's target shooting, hunting, or precision rifle work. At 50 cases per bag, you have enough material for a serious reloading session without excess inventory.

If you're new to reloading .303 British or returning to the cartridge after years away, Winchester brass is a forgiving starting point with plenty of published load data and community knowledge to draw on. Paired with quality dies, a reliable press, and proper technique, these cases will deliver consistent, accurate ammunition shot after shot.

Key Features

• Unprimed brass—choose your own primers for maximum flexibility
• 50 cases per bag for efficient reloading sessions
• .303 British rifle cartridge—designed for classic and modern rifles chambered in this caliber
• Winchester quality for consistent performance across multiple loadings

Specifications

Frequently Asked Questions

Can I reload .303 British brass multiple times?

Yes. Winchester brass is designed to withstand multiple reloading cycles. Proper care—including case inspection, cleaning, and avoiding excessive pressure—will extend the life of your brass significantly.

What rifles use .303 British ammunition?

.303 British is chambered in historic rifles like the Lee-Enfield and modern sporting rifles designed for the caliber. Check your rifle's markings or manual to confirm it is chambered in .303 British before reloading ammunition for it.

Do I need to resize .303 British brass before reloading?

Yes. Like all rifle brass, .303 British cases must be resized with appropriate dies before reloading. Make sure your press and die set are compatible with .303 British specifications.

What's included in a 50-case bag?

Each bag contains 50 unprimed .303 British brass cases. Primers, powder, bullets, and other reloading components are sold separately.