Today I completed this challenge... Twice in a row! (To my surprise.) After shooting the first group I got up to eat a cheese string and noticed that I had an audience of 4 does about 40 m behind me. In my best effort to impress them, I lobbed-off another 10 rounds thinking I could do better. Unfortunately, I reckon one round was deflected by a snowflake so my second group wasn't quite as good as the first. Still good enough for the girls I go with.
Shot prone from 324 yards with a factory Tikka CTR in 6.5 CM supported by a Harris bipod and a sock full of rice. Weather was about 6 degrees, mixed precipitation, and 3 or 4 scope clicks of wind gusting from shooter's left.
This was my first time trying this challenge, my first time shooting at that spot, and my first post here on CGN so hopefully I can make the pictures work.
This is high-quality practice! Hoping to improve my results throughout the summer.