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Rifles, Reloading, Optics, Equipment
Reloading
Temperature Sensitivity of Alliant Reloder 26
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<blockquote data-quote="Wedgy" data-source="post: 1321201" data-attributes="member: 64108"><p>I live out west where it gets hot in the summer when we pig hunt because nothing else is open, and I do testing also. The other week I got to test loads with a big temp swing to the "hot" levels. Speeds were with Labradar</p><p>Load is 7mm RUM 143 grain Hammer HBN 93.0 Reloader 26 CCI250 3.6"</p><p>On the 12th it was 68F and speeds were 3601, 3604, 3606, 3610</p><p>On the 16th it was 95F and speeds were 3649, 3650, 3651, 3655</p><p></p><p>So more or less a 27F rise gave about~ 50fps gain in velocity at the temp swing from 68 to 95F. That's 95F in the shade and yes I had the range all to myself. The rise puts this load to where primers really flatter and faint ejector marks. It boosts it a little over what a grain of powder increase would yield. I have a 6.5x284 load with IMR7828 that I cannot shoot in the hot temps (above 85F) as it sees a huge increase. A lower charge isn't accurate enough to keep. </p><p>So the term "temp stable" is within a range that most hunt but I think somewhere around the ~83F mark the fps per degree really starts to increase. </p><p>I know Shawn of Defensive Edge uses H1000 because he said it was the most stable powder he tested even though he got more velocity from others.</p></blockquote><p></p>
[QUOTE="Wedgy, post: 1321201, member: 64108"] I live out west where it gets hot in the summer when we pig hunt because nothing else is open, and I do testing also. The other week I got to test loads with a big temp swing to the "hot" levels. Speeds were with Labradar Load is 7mm RUM 143 grain Hammer HBN 93.0 Reloader 26 CCI250 3.6" On the 12th it was 68F and speeds were 3601, 3604, 3606, 3610 On the 16th it was 95F and speeds were 3649, 3650, 3651, 3655 So more or less a 27F rise gave about~ 50fps gain in velocity at the temp swing from 68 to 95F. That's 95F in the shade and yes I had the range all to myself. The rise puts this load to where primers really flatter and faint ejector marks. It boosts it a little over what a grain of powder increase would yield. I have a 6.5x284 load with IMR7828 that I cannot shoot in the hot temps (above 85F) as it sees a huge increase. A lower charge isn't accurate enough to keep. So the term "temp stable" is within a range that most hunt but I think somewhere around the ~83F mark the fps per degree really starts to increase. I know Shawn of Defensive Edge uses H1000 because he said it was the most stable powder he tested even though he got more velocity from others. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Temperature Sensitivity of Alliant Reloder 26
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