--- title: "Winchester 300 Win Mag Unprimed Brass Cases" description: "Unprimed 300 Win Mag rifle brass cartridge cases in a 50-piece box. Some mouths may need sizing, deburring, and chamfering before use." canonical_url: "https://www.kygunco.com/product/winchester-ammo-wsc300wmu-300-wm-unprimed-cases-50pk" meta: author: KYGUNCO "og:description": "Unprimed 300 Win Mag rifle brass cartridge cases in a 50-piece box. Some mouths may need sizing, deburring, and chamfering before use." "og:image": "https://cdn.kygunco.com/assets/products/114838/thumbnail.jpg?v=1713453142" "og:image:height": "500" "og:image:width": "500" "og:title": "Winchester 300 Win Mag Unprimed Brass Cases" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Ammunition](https://www.kygunco.com/category/ammunition) / [Reloading Ammunition](https://www.kygunco.com/category/ammunition/reloading-ammunition) / [Brass](https://www.kygunco.com/category/ammunition/reloading-ammunition/brass) / WNC-WSC300WMU ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/114838/main.jpg?v=1713453142) For illustration purposes only, this image may not be an exact representation of the product. # WINCHESTER AMMO 300 WM Unprimed Cases 50rd Unprimed rifle brass cartridge cases in 300 Win Mag, supplied in a 50-piece box. Built to Winchester manufacturing standards for loading and reloading, with deburred and chamfered portions intact; some mouths may need sizing, deburring, and chamfering before use. $52.10 ** 5 interest-free payments of **$10.42** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Flat Rate $13.94 for every 25 lbs. Shipping to HI & AK may incur additional fees. ** Ships To Your Home Fulfilled by a partner warehouse. ** Partner Fulfilled Selling fast. Limited quantities available. Item # 114838 Style WNC-WSC300WMU UPC 020892632066 Condition New Manufacturer [Winchester](https://www.kygunco.com/brand/winchester) Weight 1.5 lb Made with a strict regimen of manufacturing standards, Winchester Unprimed Rifle Brass Cartridge Cases - 300 Win Mag are built to hold up under even the most difficult conditions. These Winchester Rifle Shellcases are undated, which means that they can be loaded and reloaded without causing damage to the sensitive primer. Assemble these Winchester Unprimed Brass Cartridge Cases with the deburred and chamfered portion still intact, and you're ready for some reliable rounds. Sometimes during the manufacturing process, slight shifts can occur that cause imperfect round mouths, but the majority of the time they can be used as-is, deburred and chamfered. However, imperfect round mouths should be sized, deburred and chamfered before attemptnig to fire. The cases in this condition should not be considered "loaded" and should be sized, deburred and chamfered before firing. The Winchester Unprimed Brass Rifle Cartridge Cases 300 WSM come in a 50-piece box. For optimal accuracy and performance, competitive shooters and game hunters alike prefer using Winchester Unprimed Brass Rifle Cartridge Cases - 300 Win Mag. ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## More from Winchester ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/winchester-ammo-wsc300wmu-300-wm-unprimed-cases-50pk#webpage","@type":"WebPage","description":"Unprimed 300 Win Mag rifle brass cartridge cases in a 50-piece box. 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