I got to the range today about 25 minutes before it closed and managed to shoot a a rushed 378-8x on the 50 yard prone course of fire with a temperature of around 65 degrees and probably a 5-8 mph tailwind. Not a very impressive score and I definitely wasn't impressed with my groupings but I figure it's about what's to be expected shooting in a hurry after a long day at work. I picked up a new sling I've yet to try, we'll see if a sling makes a difference.
My two best groups are pictured.
On a side note, I was going to ask how a wind coming from directly behind you impact the flight of the projectile but I found an excellent article explaining it, for anybody interested:
http://www.exteriorballistics.com/eb...ned/5th/32.cfm