Labradar has a learning curve. Once you learn its nuances, missed shots are very, very rare. A few things I've learned:
- The external microphone should be standard equipment. I use it All The Time, because it's far easier to move that microphone for optimal trigger positioning than to move the whole unit when I'm shooting everything from an 18" .22 to a 28" braked 6.5CM.
- An unbraked 24" .223 requires almost the same mic positioning as a .22 rimfire.
- A braked 16" .223 uses the same mic setting as a braked 28" 6.5CM.
- USE THE LOW POWER SETTING on indoor or cluttered ranges. Nobody talks about this much. It should be talked about more. And it doesn't take much clutter to get bad readings due to rf scatter from the standard power setting.
- A crowded range is indeed a pita when I'm trying to chrono a light caliber and there are people around me shooting braked .243-.30 cal stuff.
- I don't even put AA batteries in mine anymore because they are really that useless. Just get a rechargeable battery pack and forget internal batteries.
- For .22s, I find the microphone needs to be about half-inch to the side of the muzzle. Use the "handgun" setting, not rifle.
I've only called LR tech support one time - couldn't get my unit to chrono .22 rimfire. Took the guy about 90 second to set things right (more accurately, make the settings on my unit right) in real time on the range.
Anyone who simply can't get their unit to read should call LR support. Any electronic device can be DOA or go bad early on. I recently started using a very expensive gadget that simply wouldn't work right out of the box; long story short, the thing was indeed dead and the manufacturer had another one on my doorstep in short order.