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Rifles, Reloading, Optics, Equipment
Reloading
Temperature sensitivity of US869
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<blockquote data-quote="Guest" data-source="post: 128514"><p>[ QUOTE ]</p><p><strong>In one very limited test, we shot three loaded with 92 grs at 98 degrees F. then followed up with three of the same which had been put into a cooler and brought down to 60 degrees. The net finding was about 250 fps of velocity loss for the colder ones. </strong></p><p></p><p>[/ QUOTE ]</p><p>A++ work/data. The approach is not perfect (at 60 deg the air in the pipe will be denser) - denser air would lower the velocity even more (but probably less than 3%). What a great idea - work up a velocity/temp data chart.</p></blockquote><p></p>
[QUOTE="Guest, post: 128514"] [ QUOTE ] [b]In one very limited test, we shot three loaded with 92 grs at 98 degrees F. then followed up with three of the same which had been put into a cooler and brought down to 60 degrees. The net finding was about 250 fps of velocity loss for the colder ones. [/b] [/ QUOTE ] A++ work/data. The approach is not perfect (at 60 deg the air in the pipe will be denser) - denser air would lower the velocity even more (but probably less than 3%). What a great idea - work up a velocity/temp data chart. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Temperature sensitivity of US869
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