carlsbad
Lions don't lose sleep over the opinions of sheep.
Sounds like that is your problem. With my 30 in barrel and 6BR (tiny) muzzzle blast I was getting no readings the first day I went. moved it out to my muzzle and it picked up every shot. Make sure it is "aimed" at your target. Yes, I can see that you can't reach it from prone. You'll have to turn it on before you get down.
--Jerry
--Jerry