With the advent of Labradar, a new question comes up. Is it legal to use in a highpower match? From the rulebook on electronic devices: 3.22 Electronic Devices – Competitors are responsible to ensure that all electronic communications and audio devices in their possession forward of the Ready Line are silenced and communication disabled. (a) During team matches only, team members may communicate with each other via communications devices. These communication devices must only be capable of communicating with other team members, and must not interfere with safety, range operations, or other competitors. NOTE: Communications between the line and the pit during team matches is forbidden. From what I can tell, they are legal. Does anyone have another rulebook reference that says they are not? The next question is whether they constitute an advantage, or more succinctly phrased, should I have one? For those F-class competitors using them, do you see an advantage in one-the-spot decision making? I can see the advantage in taking velocity recordings to understand the temperature sensitivity of powder, effectiveness of loading techniques, etc..