They can all do that. Don't set it up next to other shooters.For all who are interested, just the facts. I purchased a Chrony Master Gamma 3/15/2010. I found that the unit would display an ‘error’ every time someone else would shoot next to me. I sent the unit back to the store and was provided a new one. Again I found the replacement was defective. I sent the replacement back to Chrony in New York. They replaced all the electronics and provided unit number 3. Once again it failed and this time I videoed the problem. Same problem all 3 times. Chrony will not refund my money. So far I’m out the cost of shipping (x2) and the cost of the chronograph and case. I provide this information to all who are in need of a chronograph. Just the facts.
I'm thinking about getting a Pro Chrono myself. I've had two Shooting Chrony's and never had any real problems with either other than the occasional "err" if I've got it close enough to actually read the display or the occasions where It'll show the exact same velocity for two or three shots which is almost certainly a missed reading.I replaced it with a Pro Chrono digital for about the same price and the improvement was marvelous, very seldom a missed reading regardless of the angle of the light.
I find a good way to set the chronograph up promptly and with the least fuss is to set a rifle up on bags so the sight stays on the target. Put a laser bore sighter in. Check that the sight is still on the target with your hands off the gun. Then go out and adjust the chronograph position until the laser appears on your palm at the center of both screens areas.