So today was my Sig Sauer Academy "reach for a thousand" instructional class, and wow what an eye opening experience as to what our military snipers have to deal with in long range intense battle situations (and 1K is only the START of "long range"). I typically shoot 600 yd mid range and have gotten pretty good , but my goal with the 1K class was to gain knowledge about the climate variables at 1K and how they more impact shots vs 600 yds. I opted to use my .300 Win Mag and my 208 Amax handloads. I'm glad I chose this over my .308 as some students had issues with .308 going transonic and destabilizing and causing erratic hits. The class was 10 students of varying abilities, so with higher skills and a few with minimal experiences. I'm typically about a 2 moa shooter at 600 yds , but at 1K I was at best shooting 3 moa. All of my bad habits really took their toll and 1K is now where your heartbeat causes crosshair movement and breathing is critical. My instructor showed me a new "mechanics deficiency" which was introducing excessive cant as I shot my strings. I never noticed this, and it's not an impactive issue until you get beyond 500 yds. So he suggested a bubble clamped to my scope as an aid. Over all I did great, I was able to hit a 10" balloon at 1K (admittedly it took about 8 shots to get there). I cam away from this class with a good baseline of inputting variable atmospheric correctional conditions to help consistency. Here's a couple pics , note the small black spec way at the end of the pic is a 48"x48" steel gong