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Rifles, Reloading, Optics, Equipment
Reloading
Case capacity vs pressure
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<blockquote data-quote="Veteran" data-source="post: 2368453" data-attributes="member: 118038"><p>When I measured my .338 LM</p><p>cases I found huge differences in different manufacturers volume for my brass.</p><p></p><p>I had some Hornady cases and the average volume by weight of water was only 107.</p><p></p><p>On the other hand my Lapua brass averaged 116.1</p><p></p><p>So, the same charge I would shoot in the Hornady cases would have a wild increase in muzzle velocity and pressure vs. my Lapua cases</p><p></p><p>Say I developed a hot load using my Lapua cases.......that load could blow me up if I shot it in a Hornady case.......</p><p></p><p>You have to measure your case volumes and develop loads using only 1 brand and type of brass if you want to be safe and get low ES and SD and consistent small groups.</p></blockquote><p></p>
[QUOTE="Veteran, post: 2368453, member: 118038"] When I measured my .338 LM cases I found huge differences in different manufacturers volume for my brass. I had some Hornady cases and the average volume by weight of water was only 107. On the other hand my Lapua brass averaged 116.1 So, the same charge I would shoot in the Hornady cases would have a wild increase in muzzle velocity and pressure vs. my Lapua cases Say I developed a hot load using my Lapua cases.......that load could blow me up if I shot it in a Hornady case....... You have to measure your case volumes and develop loads using only 1 brand and type of brass if you want to be safe and get low ES and SD and consistent small groups. [/QUOTE]
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Case capacity vs pressure
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