When I used my PACT it would sometimes give erroneous readings if I was shooting something with higher muzzle blast and figured the shock wave was affecting the readings. A bright sun at mid day or later in the day with the sun shining directly into the slots of the skyscreens would give either false readings or no reading at all.
A day with a high overcast worked the best of all.
Last edited by navlav8r; 10/13/21.
