OK, I am trying to learn to stretch my ranges out and I am stuck at 700 yards with a question. I just started using 300 gr bergers and they seem to be doing great. I went to the range today and made up a new drop chart from vortex site. My chono showed 2858, my elevation is 4200, temp today was 80. I dialed the scope dead on at 100 and then dialed 53 clicks for my 700 yard shot. Two shots, both hit high. One shot about 10 inches above POA and the other about 15 inches above. I was also several inches left. I moved one click right and down two clicks. My next three shots hit about 8 inches below POA. I came up one click and fired two more and I was still about 7 inches low. I dialed up one more click, same as where I started and was 6 inches below POA. The groups kept getting better the more I shot. The barrel was super clean when I started with 4 shots at 100, so the first two shots at 700 were no. 5 and 6. The barrel was warm, but not hot. I am thinking of shooting again in the morning without cleaning the barrel and see where the shots place. Am I missing anything? I also dialed back 11 clicks according to my drop chart and center punched a gong at 600 yards on my last shot. I want to keep stretching the range, but I need to find out why my POA is changing. Any thoughts?