How will the wind shift my .223 @100yds?

[solman]

I ws shooting yesterday but it was pretty windy out. News said 10mph but it felt like more to me.
The wind was coming at me on a slight diagonal and I am wondering how much this will shift a 55 grain fmj @100 yards?
I did not chrono these loads but it was 24.5g of WC844. I have shot these with good results in the past but not so yesterday. I like to blame the wind because it couldn't be me

 

[taliv]

A full value 10mph wind is probably worth .1 mil or .36" at 100 yd. if the wind varied from zero to 10 mph as you shot an otherwise perfect group it would result in a horizontal stringing of less than half inch.

Ime the wind affects the shooter quite a bit more than many realize. It blows you around a bit while you're trying to hold still. It also blows the targets around pretty good too. So it could be the wind but probably not the way you were thinking.

 

[rcmodel]

According to Hornady ballistics table:

A 10MPH 90 degree cross-wind will drift that bullet at 3,000FPS, 0.9" at 100 yards.

4.1" at 200.
9.8" at 300.
19.0 at 400.
32.2" at 500.

Half that at 45 degrees.
Twice that at 20MPH.

rc

 

[FL-NC]

Depend on wind speed and direction and the properties of the rifle/cartridge: muzzle velocity, twist rate, BC, projectile weight and design, etc.

 

[grogetr]

I ran into the same thing a couple months ago. I didn't see much effect at 100 yds but at 2-300 there was a big shift in poi.

http://www.thehighroad.org/showthread.php?t=791969 Here is what everyone had to say when I asked.

 

[Traffer]

From post #2 talif: "Ime the wind affects the shooter quite a bit more than many realize. It blows you around a bit while you're trying to hold still. It also blows the targets around pretty good too. So it could be the wind but probably not the way you were thinking."

Oddly enough, this same principal is true of golfing. You would think that the wind would affect the long shots in golf far more than putting. But low and behold statistics show that Putting is far more apt to be affected by the wind than ball flight for the same reason. Buffeting the person who is trying to concentrate.

 

[Inazone]

My strictly non-scientific, anecdotal experience has been that a crosswind in the 15-20mph range was enough to make me question my eyesight at just 100 yards and question my sanity at 200-300 yards, that being the furthest out I have an opportunity to shoot at. I recall shooting at a steel gong on a windy, rainy day, straining to hear my hits at 200. Failing to do so, I hung paper instead.

Yeah . . . I wasn't hearing the hits because there was nothing to hear. Pulling back in to 100, I was lucky to be off by "only" an inch on paper; it was worse with some of the stronger gusts. That bullseye proved to be the safest place on the range that day.

 

[tuj]

from my experience, wind with a high-velocity bullet at 100 yards is minimal effect at best. I shoot a lot of 17hmr and .223 at 100yds and usually wind won't open my groups up more than 1.5 MOA. Both rifles will shoot sub-MOA at 100 with no wind.

Wind also does tricky things to your bullet.