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Rifles, Reloading, Optics, Equipment
Reloading
Temperature Sensitivity Test: IMR 8133 and Reloder 26
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<blockquote data-quote="entoptics" data-source="post: 2076115" data-attributes="member: 104268"><p>Finally got a chance to retest IMR8133, using the exact same protocol. The inverse T/V relationship is real, and repeatable...<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite10" alt=":oops:" title="Oops! :oops:" loading="lazy" data-shortname=":oops:" /></p><p></p><p>This time I used 70.5 grains instead of 70.8 (175 ELDX, 7mm RM, 26"), and the velocities were right in line with that change, but the cold rounds still shot WAY faster than the hot ones. I have no explanation...</p><p></p><p>IMR 8133 - "Cold" average = 3032 fps, "Hot" average = 2974 fps, -0.9 fps/deg (dubya tee eff!?!?! x 2)</p><p>[ATTACH=full]240308[/ATTACH]</p><p></p><p>I also tested H1000 today (66.3 gr, 175 ELDX), which showed a bit more insensitivity than I expected, but at least it was in the right direction...</p><p></p><p>H1000 - "Cold" average = 2911 fps, "Hot" average = 2954 fps, 0.7 fps/deg.</p><p>[ATTACH=full]240313[/ATTACH]</p></blockquote><p></p>
[QUOTE="entoptics, post: 2076115, member: 104268"] Finally got a chance to retest IMR8133, using the exact same protocol. The inverse T/V relationship is real, and repeatable...:oops: This time I used 70.5 grains instead of 70.8 (175 ELDX, 7mm RM, 26"), and the velocities were right in line with that change, but the cold rounds still shot WAY faster than the hot ones. I have no explanation... IMR 8133 - "Cold" average = 3032 fps, "Hot" average = 2974 fps, -0.9 fps/deg (dubya tee eff!?!?! x 2) [ATTACH type="full" alt="Screen Shot 2021-01-09 at 5.53.35 PM.png"]240308[/ATTACH] I also tested H1000 today (66.3 gr, 175 ELDX), which showed a bit more insensitivity than I expected, but at least it was in the right direction... H1000 - "Cold" average = 2911 fps, "Hot" average = 2954 fps, 0.7 fps/deg. [ATTACH type="full" alt="Screen Shot 2021-01-09 at 6.21.49 PM.png"]240313[/ATTACH] [/QUOTE]
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Reloading
Temperature Sensitivity Test: IMR 8133 and Reloder 26
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