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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hodgdon's "Extreme Powder" - reduce velocity variations due to temperature changes
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<blockquote data-quote="XWrangler" data-source="post: 431300" data-attributes="member: 25242"><p><strong>Re: Hodgdon's "Extreme Powder" - reduce velocity variations due to temperature chan</strong></p><p></p><p>I did my own non-scientific test a couple of months ago with some powders.</p><p>The temperature was in the upper 80s to lower 90s and I ran my loads thru the chronograph. I then took 5 of each of the same loads that I had in a cooler with dry ice. These had been in my freezer for a couple of hours at home before I went to the range with them in the cooler. I pulled them out one at a time and shot them through the chronograph and my Retumbo loads were the hands down winner. These loads were in my 6.5X284. I had loads with Accurate Magpro, Hybrid 100V, Viihtavouri N 165 and Reloader 17. Surprisingly the Reloader 17 was the second place winner. I was just going by accuracy at 200 yards and extreme spread of the speeds. The Retumbo was 9 fps extreme spread with warm temp loads and 11 with cold loads. The Reloader 17 was 13 warm and 17 cold. All of these loads had shot good groups in the gun so they were the ones I selected for the test. It was kinda fun to see the differences. I did this over a weeks time so I know there is some variation in outside temp but overall it was pretty close. If anyone else has ever tried the freezer test I would be interested to find out your results. I am always looking for a excuse to burn more powder and lead!!!</p></blockquote><p></p>
[QUOTE="XWrangler, post: 431300, member: 25242"] [b]Re: Hodgdon's "Extreme Powder" - reduce velocity variations due to temperature chan[/b] I did my own non-scientific test a couple of months ago with some powders. The temperature was in the upper 80s to lower 90s and I ran my loads thru the chronograph. I then took 5 of each of the same loads that I had in a cooler with dry ice. These had been in my freezer for a couple of hours at home before I went to the range with them in the cooler. I pulled them out one at a time and shot them through the chronograph and my Retumbo loads were the hands down winner. These loads were in my 6.5X284. I had loads with Accurate Magpro, Hybrid 100V, Viihtavouri N 165 and Reloader 17. Surprisingly the Reloader 17 was the second place winner. I was just going by accuracy at 200 yards and extreme spread of the speeds. The Retumbo was 9 fps extreme spread with warm temp loads and 11 with cold loads. The Reloader 17 was 13 warm and 17 cold. All of these loads had shot good groups in the gun so they were the ones I selected for the test. It was kinda fun to see the differences. I did this over a weeks time so I know there is some variation in outside temp but overall it was pretty close. If anyone else has ever tried the freezer test I would be interested to find out your results. I am always looking for a excuse to burn more powder and lead!!! [/QUOTE]
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Hodgdon's "Extreme Powder" - reduce velocity variations due to temperature changes
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