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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Powder thermal sensitivity
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<blockquote data-quote="paul scrobohaci" data-source="post: 2949704" data-attributes="member: 112087"><p>In a slightly different vein: I experimented with using non-magnum large rifle CCI primers (clearly not what 300 WinMag calls for) and found that I can systematically shave ~10 fps off the MV ES (presumably because of the smaller disturbance they cause) and never had any misfires (over 30-50 rounds). The average MV did go down ~60 FPS by doing this.</p><p></p><p>I took advantage of this experiment to find out whether I'm at the low limit of the non-magnum primer's ability to ignite the powder, by cooling rounds with non-magnum primers to 25F. All 3 (only) fired fine. And yes, it's not a statistically significant sample, I'll have to try it again with at least 20.</p><p></p><p>It is conceivable that this practice may cause faster barrel throat erosion because of less complete powder ignition.</p></blockquote><p></p>
[QUOTE="paul scrobohaci, post: 2949704, member: 112087"] In a slightly different vein: I experimented with using non-magnum large rifle CCI primers (clearly not what 300 WinMag calls for) and found that I can systematically shave ~10 fps off the MV ES (presumably because of the smaller disturbance they cause) and never had any misfires (over 30-50 rounds). The average MV did go down ~60 FPS by doing this. I took advantage of this experiment to find out whether I'm at the low limit of the non-magnum primer's ability to ignite the powder, by cooling rounds with non-magnum primers to 25F. All 3 (only) fired fine. And yes, it's not a statistically significant sample, I'll have to try it again with at least 20. It is conceivable that this practice may cause faster barrel throat erosion because of less complete powder ignition. [/QUOTE]
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