In addition to above target cam,
While on topic of High tech range stuff (I know some might fear such mojo) I also have another good friend that purchased the radar chrony. We held a wonder R&D session using both these whizz-bang items at same session. The fact that after brief set up both units did not intrude on operations was great. The Chronograph beyond recording velocity data can be readily moved beside each bench. So multiple users can gain info on there loads. Since there is no down range "fiddling" after placement the line is not disturbed either
https://www.amazon.com/Labradar-Bullet-S...hronograph
This device could be used at any range or event to allow competitors to proof loads at certain velocity level even if range is only a dirt pile located safely to one side of main event.