Effects of wind on grouping

[fecmech]

Gentlemen--There are plenty of charts out there on the effects of wind on bullets that have to do with wind speed and direction. I have not found any info on direct head winds or tail winds. The range I shoot at many times has a wind blowing from behind the shooter towards the target. Can someone give me an idea of the effects of such a wind in the 5-15 mph range on cast bullets with bc's of about .2 and velocities in the 1100-1500 fps range. Thanks Nick

[runfiverun]

raises andd lowers impact. head wind can raise and move slightly right, tail wind can lower and move left some.
something about a boolit spinning in flight,and it's nose being tipped up till it settled down.

[Tom Myers]

Gentlemen--There are plenty of charts out there on the effects of wind on bullets that have to do with wind speed and direction. I have not found any info on direct head winds or tail winds. The range I shoot at many times has a wind blowing from behind the shooter towards the target. Can someone give me an idea of the effects of such a wind in the 5-15 mph range on cast bullets with bc's of about .2 and velocities in the 1100-1500 fps range. Thanks Nick

Hi Nick,

When my New, Improved, Deluxe Precision Ballistics and Records Software is ready for distribution, the Ballistics Module will have a Head~Tail wind calculation chart. This is for the Lyman 311141 launched at 1300 fps with a BC of 0.216 and indicates the Vertical change in bullet impact with various head and tail winds out to 500 yards.

Hope this helps.

Respectfully,
Tom Myers
Precision Ballistics and Records (http://www.tmtpages.com)


http://www.tmtpages.com/LinkSkyImages/forum_images/headwind_chart.jpg

[fecmech]

Tom--Thank you very much, that's a great piece of work!