Winchester Ammo WSC358U Unprimed Cases358 Win Rifle Brass 50 Per Bag

The Winchester 358 Win unprimed rifle brass gives reloaders a foundation for precision handloads in this potent medium-bore cartridge. Whether you're working up loads for a classic lever gun, a modern bolt-action, or a custom build, 358 Winchester brass demands quality—and Winchester's own manufacture ensures consistent wall thickness, primer pockets, and flash holes that match factory specifications. These unprimed cases arrive ready for your sizing die and loading bench, fifty rounds per bag, giving you the raw materials to build ammo tailored to your rifle's personality and your hunting or range requirements.

358 Win sits in a sweet spot between the common .308 Winchester and heavier magnum rounds. It's respected for deer and larger game hunting, and it's also a favorite among handloaders who enjoy experimenting with bullet weights and powders without breaking the bank on premium factory ammunition. Starting with verified Winchester brass removes one variable from your load development—you know the cases are properly formed and ready to reload. Because you're buying unprimed cases, you control the primer choice, the powder charge, and the bullet, making this an ideal option for the reloader who wants full authority over their finished round.

Winchester's reputation in both factory ammunition and component manufacturing means their brass is engineered to uniform standards. When you're developing loads, that consistency matters: it affects velocity spreads, pressure curves, and group tightness downrange. With fifty cases per bag, you have enough for a solid reloading session or to maintain a steady component supply as you work through multiple iterations of your pet load.

Key Features

• Unprimed Winchester brass—no primer included, you choose your own
• 358 Winchester caliber, fifty cases per bag
• Consistent case dimensions and pocket tolerances for uniform handloads
• Suitable for rifle reloading, hunting, or range load development

Specifications

Frequently Asked Questions

What is 358 Winchester brass used for?

358 Winchester brass is used by handloaders to create custom ammunition for rifles chambered in 358 Win. The cartridge is popular for hunting medium to larger game and for precision rifle work at the range. As an unprimed case, it gives you complete control over your load: you select the primer, powder, bullet weight, and seating depth to match your rifle and your purpose.

Do I need primers and powder for these cases?

Yes. These are unprimed cases, so you will need to source primers separately and pair them with your chosen powder and bullets. This is standard for reloaders who want to customize their ammunition from the ground up.

How many reloads can I get from one bag?

Each bag contains 50 unprimed cases. How many times you can reload each case depends on your loads, your rifle, and your maintenance—that's something you'll determine through your own experience and testing.

What rifles fire 358 Winchester?

The 358 Winchester is chambered in various rifles, including Winchester Model 88 lever-actions, bolt-action rifles, and modern custom builds. Check your rifle's barrel marking or owner's manual to confirm it's chambered in 358 Win before purchasing brass and components.