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Rifles, Reloading, Optics, Equipment
Reloading
How do the factories load "universal" high performance cartridges??
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<blockquote data-quote="BrentM" data-source="post: 1981654" data-attributes="member: 61747"><p>Duplexing/compounding powder. Proprietary blends.</p><p>Virgin Brass.</p><p></p><p>There is no real magic to it other than controlling the feed of the powder charge into the brass. </p><p></p><p>Often factory ammo works in a wide range of rifles if the chamber is saami spec and the fps is quite close to the box data if the barrel is within reasonable spec of the test barrel. </p><p></p><p>It is very common to see virgin brass handle significantly more charge due to the undersized nature of the brass. Once the brass if 1x fired the brass will expand and even after resizing likely not match virgin level. After several firings it will be a fair bit larger in the web and a virgin brass hot load will be dangerous in multiple fired and sized brass. Work hardening etc has a lot do with case body expansion charateristics.</p></blockquote><p></p>
[QUOTE="BrentM, post: 1981654, member: 61747"] Duplexing/compounding powder. Proprietary blends. Virgin Brass. There is no real magic to it other than controlling the feed of the powder charge into the brass. Often factory ammo works in a wide range of rifles if the chamber is saami spec and the fps is quite close to the box data if the barrel is within reasonable spec of the test barrel. It is very common to see virgin brass handle significantly more charge due to the undersized nature of the brass. Once the brass if 1x fired the brass will expand and even after resizing likely not match virgin level. After several firings it will be a fair bit larger in the web and a virgin brass hot load will be dangerous in multiple fired and sized brass. Work hardening etc has a lot do with case body expansion charateristics. [/QUOTE]
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How do the factories load "universal" high performance cartridges??
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