Took my 40c to the range for the fist time and shot 2, 5 round groups and was hitting an inch or so to the right and an inch or so low at 7 yards.. I looked at the front site and saw that it was off center about .02 I estimated. I trig'ed it out at home and moving it .025 should bring it to center line. Still need to adjust the poi higher. I did end up shotting about 150 rounds through it and was consistantly off to the right and low. And it was prporionally off the greater the distance. The up side is using a make shift rest I held one 5 shot group to within 1 inch at 7 yards. But it was still 1 inch low and to the right.