I was tuning on a rifle this evening, making hammer adjustments and shooting strings, recording data on the Labradar. As light was failing, so was the tin of pellets. I literally ran to the house and grabbed a new tin. When I got back to the gun, light was pretty much gone. I made about 5 more adjustments/ strings. All the shots but one jumped up almost exactly 100 fps. The one shot was in line with what I expected. I had reached the point where more hammer should give me less velocity. The one shot was lower as expected. The rest being 100 fps higher should not be. I'm not trying to get too deep into the weeds about tuning here. I know how to tune regulated guns. I do not know much about radars. I did not think light would affect them. I intend to reshoot those settings in good light and compare results, but I wanted to ask if there was something I was missing. Is shooting in front of the radar after dark no bueno? If so, why?