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Long Range Hunting & Shooting
Where is 600yd POI likely to move to????
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<blockquote data-quote="T3-OleMan" data-source="post: 659804" data-attributes="member: 14600"><p>Thanks fatrack<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> I owe you one!<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool :cool:" loading="lazy" data-shortname=":cool:" /></p><p> </p><p><strong><span style="font-size: 12px">UPDATE on Superformance powder Sensitivity!</span></strong></p><p> </p><p><span style="font-size: 12px">Last month Hodgdon told me that my Hornady 338WM -185GMX Superformance ammo that has MV 3,080fps on the box will shoot MV 2,997fps at ZERO F! That is because the 3,080 was shot at 70 F......that is a loss of 83 fps in the 70 degree drop!</span></p><p><span style="font-size: 12px">Here are my questions:</span></p><p> </p><p><span style="font-size: 12px">Would you assume it to be a LINEAR change for my calculations of speed at 10F, 20F, 30F, 40F etc.......= +11.857fps for each 10 degree change???</span></p><p> </p><p><span style="font-size: 12px">IF ZERO F is 2,997fps and 70 F is 3,080fps 90 F should be what....? 3,104fps.</span></p><p> </p><p><span style="font-size: 12px">And lastley, lightbulbI think this new speed change will remove that 7" high that I was going to have to adjust for when I went from S.C. 592' Elev. and 90 F to 10,000' and zero F???? What do you think? Am I Good to Go?</span></p></blockquote><p></p>
[QUOTE="T3-OleMan, post: 659804, member: 14600"] Thanks fatrack:D I owe you one!:cool: [B][SIZE=3]UPDATE on Superformance powder Sensitivity![/SIZE][/B] [SIZE=3]Last month Hodgdon told me that my Hornady 338WM -185GMX Superformance ammo that has MV 3,080fps on the box will shoot MV 2,997fps at ZERO F! That is because the 3,080 was shot at 70 F......that is a loss of 83 fps in the 70 degree drop![/SIZE] [SIZE=3]Here are my questions:[/SIZE] [SIZE=3]Would you assume it to be a LINEAR change for my calculations of speed at 10F, 20F, 30F, 40F etc.......= +11.857fps for each 10 degree change???[/SIZE] [SIZE=3]IF ZERO F is 2,997fps and 70 F is 3,080fps 90 F should be what....? 3,104fps.[/SIZE] [SIZE=3]And lastley, lightbulbI think this new speed change will remove that 7" high that I was going to have to adjust for when I went from S.C. 592' Elev. and 90 F to 10,000' and zero F???? What do you think? Am I Good to Go?[/SIZE] [/QUOTE]
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Where is 600yd POI likely to move to????
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