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Long Range Hunting & Shooting
Altitude & Temperature Effects on a Bullet?
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<blockquote data-quote="Glock119" data-source="post: 64749" data-attributes="member: 3218"><p>[ QUOTE ]</p><p>Shadowman, good to see other people also using pressure.</p><p>Your variations for february corresponds very well with what I'm seeing at my part of the globe. (28.43-30.43 "Hg = 962-1030 hPa)</p><p></p><p>I also calculate velocity loss due ammo temperature. I freeze a batch of ammo, put it in a cooler bag (to let the ammo slowly warm up) and shoot a few rounds over the chrony at 5Celsius intervals. Not scientifically accurate, but it gives me a fair idea.</p><p></p><p>I also calculate trajectory based on airtemp, but I'm somewhat uncertain wether this is necessary as I use pressure and ammo temp already </p><p></p><p>[/ QUOTE ]</p><p></p><p>Thats neat that the Pressure is the same so far away. I would have thought that it might be a little different but its neat to know its not.</p><p></p><p>I use Temp, Baro, Humitity &amp; (Wind always set at 10 mph to make it easyer to figure 2.5, 5 or 7 mph winds) but I find for most of my shooting that it doese not cause for to much change as localy I am limited to shorter ranges.</p><p></p><p>But I like to keep track of it for those time when I can go shot at farther distances.</p><p></p><p>And when ever I get a chance to go some where different I like to take the readings and put them in to see how it effects things compared to home.</p><p></p><p>By the way what have you found with freezing them and then shooting? any good info produced by doing it or just checking for the heck of it?</p><p></p><p>Thanks,</p><p>Ben</p></blockquote><p></p>
[QUOTE="Glock119, post: 64749, member: 3218"] [ QUOTE ] Shadowman, good to see other people also using pressure. Your variations for february corresponds very well with what I'm seeing at my part of the globe. (28.43-30.43 "Hg = 962-1030 hPa) I also calculate velocity loss due ammo temperature. I freeze a batch of ammo, put it in a cooler bag (to let the ammo slowly warm up) and shoot a few rounds over the chrony at 5Celsius intervals. Not scientifically accurate, but it gives me a fair idea. I also calculate trajectory based on airtemp, but I'm somewhat uncertain wether this is necessary as I use pressure and ammo temp already [/ QUOTE ] Thats neat that the Pressure is the same so far away. I would have thought that it might be a little different but its neat to know its not. I use Temp, Baro, Humitity & (Wind always set at 10 mph to make it easyer to figure 2.5, 5 or 7 mph winds) but I find for most of my shooting that it doese not cause for to much change as localy I am limited to shorter ranges. But I like to keep track of it for those time when I can go shot at farther distances. And when ever I get a chance to go some where different I like to take the readings and put them in to see how it effects things compared to home. By the way what have you found with freezing them and then shooting? any good info produced by doing it or just checking for the heck of it? Thanks, Ben [/QUOTE]
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