Went out shooting about 9:30 this morning testing some new 9mm loads with 2 different semi's. It was somewhat windy & partly cloudy. Out of 15 shots with one pistol, I got 3 that read "189, 192, 179" with the rest being around 1064. With the second pistol, I got 3 readings that were similar to the above and the rest in the 1050-1060 range. I called Pro Chrono but the tech was not available. Both guns behaved well. With the low numbers, there was no difference in recoil, brass ejection, slide action, accuracy, etc. I'm assuming these were "environmental glitches" and nothing to worry about. Anyone ever come across this before?