[Unclenick]

That's not unusual, and it's not a lot. I'm mainly surprised you didn't see the POI move down. But chances are the new barrel doesn't lock up in quite the same position. To test this, if you have access to a laser bore sighter and can accurately center it in both barrels, you should be able to pick out a corresponding shift in POI alignment. Then the question is whether it's SL's fault or if it's the original barrel that's a little offset and that had the sights timed to it. If you can, borrow another 40 S&W barrel to try an see if there's a shift.