I bought my first CZ a month ago, which is also a 75, SP-01. The label on the end of the box was in one piece, so I know the case had not been previously opened. The paper work included the shot pattern. Mine also shot 4" low and ocassionally 1" left at 30' - 40' with 4 types of factory 115 gn FMJ off a rest. Four other shooters, who are are not rookies, had the similar results. Tried one type of 124 gn FMJ, but not the same brand as the test ammo. It also shot 3" low. I reloaded some124 and 135 gn coated RN, and 147 gn coated FP and the POI was plus or minus 1" of the POA in elevation and windage was good. My suspicion is that the faster 115 gn bullet and my lack of familiarity taking up the long slack in single action probably contributed to shooting low.