Shooting in the snow. (UPDATE)

Underthegun

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Has anyone ever done any accuracy testing in the falling snow? And what were your results. The reason I ask is because my gun didn't shoot well today and I was shooting in falling snow.
 
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I'm not sure about snow, but I don't shoot all that well when it's cold out. I have a feeling the gun does just fine, but after a while, me - not so much. Fingers on bare steel tend to get numb....
 
It was snowing pretty hard. But I was still able to see the 1/2" black dot I was shooting at. My gun usually shoots sub .5" 5 shot groups at 100 yards. Today 4 of them were around .75" and 2 right at the .5" mark. It was only about -9c today. So not really that cold. And I felt good with my shooting. But either the gun or the ammo or the snow killed my groups.
 
I have shot it at -2 before, but not -9. The 2 groups I shot at -2 averaged .38" for 5 shots at 100 yards. So I can't imagine that only 7 degrees colder would change things that much. That is why I was wondering about the snow.
 
I was shooting a new load a week or so ago in the snow and wind. Groups were pretty good. It was around -25 with the windchil that day so I didnt stay long. I have found that my groups are maybe a little better in colder temps (with my 223 that is).
 
It must have been the snow. The temp today was -20c. The pic speaks for itself.
IMG-20121225-00119.jpg

The group on the left was shot off of the rear mono-pod I got for Xmas. The next 2 groups I switched to a bag to support the rear of the rifle. I LOVE THIS RIFLE!!!
 
It must have been the snow. The temp today was -20c. The pic speaks for itself.
IMG-20121225-00119.jpg

The group on the left was shot off of the rear mono-pod I got for Xmas. The next 2 groups I switched to a bag to support the rear of the rifle. I LOVE THIS RIFLE!!!

Notice how POI changed high right when you switched rests, just goes to show how much positision plays on accuracy.
 
A couple 0.75" groups sound like normal statistical variation to me. Between rifle, ammo, atmospheric conditions, muzzle velocity, and shooter, a 0.5MOA rifle will sometimes print groups that are 0.75, and other times it'll shoot 0.2-3.

If you want to get a good indication of what your rifle will reliably do, print a 10-shot group. You should never see a 3-shot group exceed this size, and rarely a 5-shot group, assuming mechanical consistency.

Falling rain or snow will not measurably affect the POI of a supersonic bullet, unless it's coming down so heavy you can't see what you're shooting at.
 
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