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shootin
03-22-2008, 05:56 PM
Was shooting my Ar today in various winds , no flags . Groups varied from 1 inch to two and a half inches . Would ten to fifteen mile an hour winds have this much effect on a 223 at 100 yds ?
Shootin

ScottD
03-22-2008, 07:46 PM
If you shot one shot in a full left wind and the next in a full right it would be worth approx 2.4 inches total (10mph at 100 yards).

Of course you have to add to that the regular grouping ability of the rifle itself - say 1".

So you could have a total of up to almost 3-1/2 inches total spread.

Of course it could just be a rifle problem or a shooter problem - unless you shoot over flags you will never know.

Scott

AZ_Win52
03-22-2008, 08:45 PM
What did the group dispersion look like? Did you have vertical stringing or horizontal stringing. Horizontal is wind, Vertical you are having issues with equipment or loads

david dumas
03-22-2008, 09:11 PM
in that wind without flags with a 223, 2- 2 1/2 in groups would be the norm,without flags and a little time to learn what there telling you, your wasting time and ammo, those little bullets don't buck cross winds as good as bigger heavy bullets

shootin
03-23-2008, 09:22 AM
Thanks for the input . I was testing various loads for accuracy , A.E. 55gr fmj , shot about an inch top to bottom and about 2.5" wide . Win. 55gr fmj was almost a complete horizontal string , less than .5" tall and about 1.5" wide . Black Hills 60gr s.p. was three in a nice .5" triangle and two dropped out about 2" at 5 oclock . Hornady 60gr s.p. was four under an inch and again a flier at 5 o'clock 2.5" , Fed. 55gr BallisticTip shot two 5 shot groups an inch and one slightly under ctc , at this moment the wind died down and the rain picked up . Some old IMI 55grfmj I have had for quite a few years shot three in a nice .5" triangle and again dropped two 1-2' at 5 oclock . Black Hills 52gr match moly shot four into an inch with one flier opening group up to about 1.5"at 2 o'clock . Thanks for the info , so with what your saying , the 10-15mph wind would be about 1.25" drift ? Also I was shooting from the west to the east with a north wind about 8-9 o'clock .
Gun is a 1-12 twist heavy barrel olympic Arms Ultra Match upper with a Vari-XIII 2.5-10x50 . Shootin