I was recently shooting at 970 yards with my 7 RM and after a couple of cold barrel sighter rounds I preceeded to shoot a 5 shot group on paper. The first two rounds were maybe 3 inches side by side (same height). Then the thrd one was centered but about 4 inches low. Then the fourth was about 7 inches low and the fifth about 12 inches low? So do I have a walking gun or what. Do different guns walk in different directions? It seems to me that once things heat up it would cause a higher velocity and such causing the gun to walk up. But this wasn't the case. The five shots were done in about 2 min. Then I let it cool down and it did the same thing. It shot the first couple about right then started sinking down. Any thoughs or insight would be much appreciated!