I took a new Caldwell ballistics precision out to the range one day that records and is set up with an Iphone. Did what I needed to do, and a guy next to me wanted to know if he could shoot his AR through it.
Sure! Just don't shoot the equipment or the rods. He shot one time, thanked me, and left the range. I went back to shooting another caliber, and it didn't work. Rebooted the phone, etc, and finally looked at the chrono. It had two perfect stripes across both sensors that were put there by the bullet he shot.
Guess I had it level. It works manually, but the Blue Tooth to the phone no longer works.