Coming from a Caldwell unit I was anticipating more reliable readings. After 10 yard setup, for 45 Colt, 1st two shots registered, as expected, then - nothing after that. 30 shots in all - only 1st two registered. I tried everything: positioning, sensitivity, offset distance, box of rags between muzzle and device, 2 other pistols ( 380 and 9mm.) Nothing! Very disappointing! Oddly, by the end, the unit would just shut entirely down after each shot. Power up, repeat after changing a parameter, and shut-down! I was using an external battery. I watched a lot of videos where this device seemed to be working flawlessly. Now, I’m suspicious. And the money I spent for two shots - still, more disappointed than unhappy. Number for Labradar (316) 866-2525: busy all the time! Brownells will gladly replace the unit (great service) but I was interested in what Labradar had to say. Now I wonder: that external battery - maybe not powerful enough - the manual does reference this. I should try six alkaline batteries and see. Maybe, after 1st 2 shots power level, even though still showed full, was diminished enough to cause problem. Just guessing here.
