I haven't shot through the higher end units like Oehler but do use my ProChrono a lot. It has worked perfectly until this recent weekend. Shooting .308 gave readings at time of 106 fps (all five rounds were low like that). Had to shut it off and turn it back on between strings. Not sure what's happening with it. I'll change the battery before the next shoot to see if maybe that's it. This is on my personal shooting range - no others shooting here. Nothing's perfect except maybe Mr. Oehlers stuff
