Winchester Ammo WSC300BLKU Unprimed Cases300 Blackout Rifle Brass 100 Per Bag

The Winchester 300 Blackout unprimed rifle brass offers reloaders a proven foundation for building consistent, reliable ammunition. Whether you're hand-loading subsonic rounds for a suppressed AR or precision loads for a bolt-action 300 Blackout, Winchester brass gives you the quality and consistency that matter downrange. Each bag contains 100 pieces of virgin, unprimed cases — ready for your dies, primers, powder, and bullets. Winchester's reputation for reliable brass spans generations of handloaders, and their 300 Blackout cases are no exception.

Reloading your own 300 Blackout ammo lets you dial in performance exactly how you want it. Subsonic loads, supersonic hunting loads, precision target loads — the flexibility is yours. Starting with quality brass means fewer splits, better case life, and more consistent velocities shot to shot. The 300 Blackout has become a favorite among AR platform shooters and bolt-action hunters alike, and having a supply of once-fired Winchester brass on hand makes it easy to keep your ammunition pipeline full without breaking the bank.

These unprimed cases arrive ready for the reloading bench. You'll need to sort, inspect, and prepare them according to your reloading process, then add primers, powder, and bullets to complete your rounds. Winchester brass works with standard reloading equipment and pairs well with the wide range of dies, presses, and tools available for 300 Blackout reloading.

Key Features

• 100 unprimed cases per bag
• Winchester quality brass for consistent case life
• Ideal for both subsonic and supersonic 300 Blackout loads
• Compatible with standard reloading equipment

Specifications

Frequently Asked Questions

What do I need to do to these cases before loading ammunition?

These are unprimed cases, so you'll need to inspect and sort them, then process them according to your reloading procedure before adding primers, powder, and bullets. Always follow your reloading manual's guidelines for preparation and safety.

Are these cases new or once-fired?

The product description indicates these are unprimed cases; refer to the specific product listing for details on whether these are new or once-fired brass.

Will these work with my standard reloading dies?

Winchester 300 Blackout brass works with standard reloading equipment designed for 300 Blackout. Consult your reloading manual and equipment manufacturer to confirm compatibility with your specific press and dies.