My 52D exhibits an odd charactistic when I shoot. It seems when I take the first shot 100yds benchrest the impact is usually 2" high at 1 o'clock. Sometimes it takes a couple more shots for the grouping to settle down. Everything is tight, the barrel is free floated off the tuning screws and I'm using a 36x Leupold on a Viani mount. I don't clean the barrel and occasionally run a mop down the bore