To further what chinbullco is talking about(adjusting body position) remember that it must be done from the ground up. Meaning if after you open your eyes and your poa is off you must shift your whole body starting with the parts that are touching the ground. What you must not do is attempt to muscle the rifle to the correct point of aim. Using muscle to hold it there will cause you to strain and throw the shot out of the group. Shift youself while holding that same aim and you will be relaxed and holding correctly with the proper body position. Repeat the closing of the eyes and breathing until when you open your eyes the poa is exactly where it should be. As a note you must do this every time you break that position and it must be done for all shooting positions including standing. Hope this helps!