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Rifles, Reloading, Optics, Equipment
Reloading
REVERSE TEMP SENSITIVITY????
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<blockquote data-quote="tonyf3" data-source="post: 2666679" data-attributes="member: 6649"><p>I had a 7 RemMag shooting 180 grain hybrids under 72gr of Retumbo. This load was developed at 5000' at roughly 55-60 degrees F.</p><p>A few seasons later i was target shooting outside of Great Falls. 0 degrees, snowing, 4800'.</p><p>No chrono, but I was impacting about 3/4MOA high at 1,000 yards. On JBM and Applied this averages about 40fps faster in order dial 3/4moa lower. My notes from that day also point out that recoil had a different punch to it.</p><p></p><p>I tried an experiment this summer. </p><p>I had some load dev to do in the Sacramento and had lots of 90-100 degree days.</p><p>I put some dry ice and a block of ice in a small cooler and put the ammo the cooler. Ammo was 15-22 degrees</p><p>I didn't get a spike in velocity. </p><p>I got alof of funny looks and alot of questions so I don't think i'll do that again.</p></blockquote><p></p>
[QUOTE="tonyf3, post: 2666679, member: 6649"] I had a 7 RemMag shooting 180 grain hybrids under 72gr of Retumbo. This load was developed at 5000' at roughly 55-60 degrees F. A few seasons later i was target shooting outside of Great Falls. 0 degrees, snowing, 4800'. No chrono, but I was impacting about 3/4MOA high at 1,000 yards. On JBM and Applied this averages about 40fps faster in order dial 3/4moa lower. My notes from that day also point out that recoil had a different punch to it. I tried an experiment this summer. I had some load dev to do in the Sacramento and had lots of 90-100 degree days. I put some dry ice and a block of ice in a small cooler and put the ammo the cooler. Ammo was 15-22 degrees I didn't get a spike in velocity. I got alof of funny looks and alot of questions so I don't think i'll do that again. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
REVERSE TEMP SENSITIVITY????
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