close
Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels & Ballistics

Rifles, Bullets, Barrels & Ballistics Applied Ballistics

Reply

Wind at your back and ballistics

LinkBack Thread Tools Display Modes
  #1  
Unread 11-10-2006, 10:09 PM
Silver Member
 
Join Date: Oct 2006
Location: Memphis, TN
Posts: 117
Wind at your back and ballistics

I have seen lots of data about crosswinds and the effects on bullets. What if the wind is blowing from directly behind you. I was shooting a 25-06 rem. today with a 20 mph wind I shot 3 shot groups at 100, 200, and 300 yards.
100 was 4" high (normally 2") 200 was 4 inches high, and 300 was 3" low. Thats with a 120 gr factory winchester load. Something doesnt seem right. Just out of curiousity what about if its blowing in your face?
__________________
I just know enough about long range shooting to kno that I dont know sh*t about long range shooting!
Reply With Quote
  •   #2  
    Unread 11-11-2006, 07:42 AM
    Gold Member
     
    Join Date: Dec 2004
    Location: Black Hills,South Dakota
    Posts: 669
    Re: Wind at your back and ballistics

    Definately not the wind.A 6 or 12 oclock wind wont produce that amount of change at that yardage.Theorectically a perfectly horizontal 6 or 12 oclock wind wont cause any deviation,but of course theres no such thing as a perfectly horizontal wind.There will be up and down drafts,but to produce a 2" higher zero at 100 yds the wind would have to be coming straight out of the ground. [img]/ubbthreads/images/graemlins/grin.gif[/img]
    __________________
    The Constitution shall never be construed to prevent the people of the United States who are peaceable citizens from keeping their own arms -Samuel Adams
    Reply With Quote

      #3  
    Unread 11-11-2006, 01:11 PM
    Official LRH Sponsor
     
    Join Date: Jun 2004
    Location: Fort Shaw, Montana
    Posts: 6,847
    Re: Wind at your back and ballistics

    Were you shooting in an area that was not flat??

    A tail wind that comes down on your shooting position will cause down drafts and lower shot placement.

    A tail wind that runs up a hill to your target can cause updrafting that will cause your bullets to hit high.

    If your shooting over small hills at midrange you can also see some minor updrafting over these humps as well and cause slight vertical impact increases.

    Up and down drafts can raise all sorts of issues so unless your shooting over a perfectly flat range, you can see some effect on target from a tail wind. Generally at 100 yards this is not a concern so if your jumping 2" at 100 yards I would say there is something mechanical to look into or you are holding your rifle in a different manor then before.

    What rifle are you shooting, brand and style?

    Kirby Allen(50)
    __________________
    Kirby Allen(50)

    Allen Precision Shooting
    Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

    Farther, Faster and Flatter then ever before.

    Web Page: www.apsrifles.com

    allenmagnum@gmail.com
    Reply With Quote
      #4  
    Unread 11-12-2006, 05:34 AM
    Silver Member
     
    Join Date: Jan 2002
    Location: Armagh, PA
    Posts: 290
    Re: Wind at your back and ballistics

    Did you have a bipod removed or installed since you last zeroed?
    __________________
    Dan B.
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes


    Similar Threads for: Wind at your back and ballistics
    Thread Thread Starter Forum Replies Last Post
    Gone With The Wind Broken Brow Turkey Hunting 1 08-18-2011 10:05 PM
    starter budget cheap wind meter...that still reads wind!?! hmbleservant Long Range Hunting & Shooting 3 06-25-2011 10:43 PM
    CO & NM. back to back Elk hunts--pics philny1 Elk Hunting 19 11-09-2009 08:01 PM
    For You "Ballistics, Wind Drift & Ranging Inukshuk Long Range Hunting & Shooting 0 10-22-2008 07:44 AM
    338 Lapua Mag Ballistics (Black Hills 250 gr ballistics?) EYESOFTEXAS Rifles, Bullets, Barrels & Ballistics 1 12-07-2005 02:12 PM


    All times are GMT -5. The time now is 12:51 PM.


    Powered by vBulletin ©2000 - 2017, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC