The Chrony factory is down the road from my place. He used to bring his units here to test new models or new components.
He tests with a BB gun, a bow and arrow, a 22 LR, a 243, a 308 and a 12 g.
A number of units are mounted on a 2x6 board, and a single shot passes over all of them. In the middle is an expensive Ohler. I sometimes do the shooting.
The clock speed of his unit is very high, so they are accurate. It is a fine unit. The one I am using now (I have shot 7 of them) has the remote head on a 15' cord. Very handy. One model will do the math on a 10 shot string, with SD, extrme velocity, etc. handy if you want that info.
There may be better units, but not at that price. I have not seen Peter for awhile. Hope he is OK.