Falling snow effects on bullet path:

Does anyone know what effects shooting in in light snow has on bullet travel? Planning on hunting in snowy conditions next week in the mountains of western Wyoming
and just concerned that snow must have some detrimental effects on bullet path. I'm thinking it must reduce velocity over long distance, say 500 yds?
Anyone have any experience with this?
Shot many days at the range last winter with my 308 and my 6.5 Creed. 30 degrees, with lightly falling flakes had no effect on shooting my usual sub .500 MOA with these rifles. I could see target clearly at 100 yards, but 200 was much more difficult.
 
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