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Rifles, Reloading, Optics, Equipment
Reloading
Burn rate range
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<blockquote data-quote="Mike Matteson" data-source="post: 2700283" data-attributes="member: 101791"><p>Vit powders 560, and 565 are double base powder. More subject to temperature change. The other are not. All powder subject temperature change. Some powders change as much as 1fps per degree.</p><p>The mean your velocity changes that more as temperature change. Under 500yds it isn't a real big problem. Belong that it does. 30fps variation of your bullet drop by about 8.5" @ 1000yds. A 50fps variation would make your bullet change by as much as 14" @ 1000yds. Thgat doesn't work in my book.</p><p>I have attached temperature change chart by Hodgdon Powder. I wish they had done more, but it's what it is.</p><p>The Vit N560 change about 121 fps from 0 to 125 degrees. A double based powder and N565.</p><p>Now I hunt in weather from -20 to 110+ so thats 130 degree change. So you should be able to draw from there. </p><p>If you use temperature sensitive powder you'll to know what it does or will happen. So you'll need to know how that load does in different temps. So don't let that stop you. I just order a # of N140, N150, N160, and N170 powder (single base powders). Because I can't get some types of powders. I nornally use H4350, H4831SC, and going to try H1000 powder. I can't presently get Retumbo. I came close, but not cigars. I did get some H1000 powder over the net just awhile back.</p></blockquote><p></p>
[QUOTE="Mike Matteson, post: 2700283, member: 101791"] Vit powders 560, and 565 are double base powder. More subject to temperature change. The other are not. All powder subject temperature change. Some powders change as much as 1fps per degree. The mean your velocity changes that more as temperature change. Under 500yds it isn't a real big problem. Belong that it does. 30fps variation of your bullet drop by about 8.5" @ 1000yds. A 50fps variation would make your bullet change by as much as 14" @ 1000yds. Thgat doesn't work in my book. I have attached temperature change chart by Hodgdon Powder. I wish they had done more, but it's what it is. The Vit N560 change about 121 fps from 0 to 125 degrees. A double based powder and N565. Now I hunt in weather from -20 to 110+ so thats 130 degree change. So you should be able to draw from there. If you use temperature sensitive powder you'll to know what it does or will happen. So you'll need to know how that load does in different temps. So don't let that stop you. I just order a # of N140, N150, N160, and N170 powder (single base powders). Because I can't get some types of powders. I nornally use H4350, H4831SC, and going to try H1000 powder. I can't presently get Retumbo. I came close, but not cigars. I did get some H1000 powder over the net just awhile back. [/QUOTE]
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