--- title: "RCBS Neck Sizer Die 300 Rem Ultra Mag" description: "Neck sizer die for 300 Rem Ultra Mag cases. Sizes only the neck, leaving body and shoulder untouched, and is made from hardened steel." canonical_url: "https://www.kygunco.com/product/rcbs-17630-neck-sizer-300-rem-ultra-mag" meta: author: KYGUNCO "og:description": "Neck sizer die for 300 Rem Ultra Mag cases. Sizes only the neck, leaving body and shoulder untouched, and is made from hardened steel." "og:image": "https://cdn.kygunco.com/assets/products/90618/thumbnail.jpg?v=1767793696" "og:image:height": "500" "og:image:width": "500" "og:title": "RCBS Neck Sizer Die 300 Rem Ultra Mag" --- > 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) / [Reloading Dies](https://www.kygunco.com/category/ammunition/reloading-ammunition/reloading-dies) / RCB-17630 ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/90618/main.jpg?v=1767793696) For illustration purposes only, this image may not be an exact representation of the product. # RCBS Neck Sizer 300 Rem Ultra Mag Neck sizer die for 300 Rem Ultra Mag cases. It sizes only the case neck, leaving the body and shoulder untouched to help maintain bullet tension, extend case life, and support accuracy. Made from hardened steel and backed by RCBS's lifetime guarantee. $31.94 ** 4 interest-free payments of **$7.99** 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 Almost gone. Order now before it sells out. Item # 90618 Style RCB-17630 UPC 076683176301 Condition New Manufacturer [RCBS](https://www.kygunco.com/brand/rcbs) Weight 2 lb The RCBS Neck Sizer Die is another example of the superior reloading components produced by RCBS. Built with premium materials and precision manufacturing, it comes backed by the company’s lifetime guarantee, reflecting their confidence in quality and durability. This die sizes only the neck of the cartridge case, leaving the body and shoulder untouched. By doing so, it provides just the right amount of tension to securely hold the bullet in place. The result is extended case life and improved accuracy. Constructed from hardened steel, the RCBS Neck Sizer Die is engineered for long-lasting performance. ** 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 RCBS ```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/rcbs-17630-neck-sizer-300-rem-ultra-mag#webpage","@type":"WebPage","description":"Neck sizer die for 300 Rem Ultra Mag cases. 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