I ran two LabRadars for years. The trigger definite helped a lot, but was annoying when if would fall off and you didn't notice. Also It not timing out at the exact moment you dont want it too is nice.
A random challenge for the xero yesterday. I was shooting prone and through the deal on the bumper of my rig. Still picked up the shots. I didnt manage to "defeat" it by trying to get it to read off the hood. Too far off to be triggered. .416 Barrett so no lack of muzzle blast.
I have the following
200 Once fired ADG 300 PRC brass...................................$250
100 Once fired peterson 300 win mag brass.................$100
49 Once fired Sig 300 win mag brass...............................$30
50 Once fired Peterson 6.5...
Im not sure what it was about BUT I did get one odd reading in the rain. was 3000 some fps when the rifle was solidly in the low 2800's. Was the only one oddity thus far.