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Rifles, Reloading, Optics, Equipment
Reloading
Tuning loads for cold weather?
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<blockquote data-quote="Greyfox" data-source="post: 1528868" data-attributes="member: 10291"><p>IMO, I think you have a couple of options. The first, if your velocity/temperature curve is consistent, and your ES and accuracy holds, you can leave your load alone and program this the curve in your ballistic calculator (at least in the AB App.) to account for this change. According to your results shown you are loosing approximately 1.3FPS per 1 degree of temperature change. This is pretty close to the reported temperature stability of R17. While it's certainly an option, if you change your charge weight to accommodate velocity, you may have to chase it at various tempertures between the extremes.</p><p>Another option would be to try a different powder that could provide better temperature stability. For example, H4350, with a similar burn rate delivers .16FPS/degree. I have found this powder to deliver this level of stability at the temperature extremes in my 6.5x47 and 6.5CM.</p><p>See the chart below:</p><p>[ATTACH=full]114210[/ATTACH]</p></blockquote><p></p>
[QUOTE="Greyfox, post: 1528868, member: 10291"] IMO, I think you have a couple of options. The first, if your velocity/temperature curve is consistent, and your ES and accuracy holds, you can leave your load alone and program this the curve in your ballistic calculator (at least in the AB App.) to account for this change. According to your results shown you are loosing approximately 1.3FPS per 1 degree of temperature change. This is pretty close to the reported temperature stability of R17. While it’s certainly an option, if you change your charge weight to accommodate velocity, you may have to chase it at various tempertures between the extremes. Another option would be to try a different powder that could provide better temperature stability. For example, H4350, with a similar burn rate delivers .16FPS/degree. I have found this powder to deliver this level of stability at the temperature extremes in my 6.5x47 and 6.5CM. See the chart below: [ATTACH=full]114210[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Tuning loads for cold weather?
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