I took mine to the rang today. The weather was windy and cloudy, none of the standard chronographs that I have owned would have worked well, if at all. i fired over 100 rounds, 22LR, 380 Auto and 45 Auto. I had no problem with any of them. I can not say enough good things about it. This is what chronographs should have been all along. Fast and simple set up, no wasting rounds getting the skyscreens set just right, in fact nothing down range to mess with at all. All in all a very pleasant experience.