Attended two PG events where the radar gun was pointed toward either the short stop or 2nd baseman. Pricipals of radar will tell you this in not the most accurate position for the intended application. Yes, adjustments in the software can off-sett this deviation, but most of the PG events I saw there were kids running the gun. Highly doubt they programed the deviation into the gun before hand.
Even Trackman is not accurate in some PG venues....only found this out as I was sitting behind scouts with Stalker 2 guns while following the trackman reading on their website. 1-3 miles an hour variance was noted.
Have you ever seen a pitcher who appears to be throwing gas by the way he moves his body only to find out the velocity is 3-4 miles an hour less than what you thought you saw? Compare that to a pitcher who looks effortless and the ball jumps out of thier hand....