One of the biggest advantages of the Labradar is shooting at public ranges, since you don't need to set it up in front of the bench.
The other chronraph with this advantage is the Magnetospeed, since it's designed to be mounted on the barrel. The problem there, however, is this mounting can affect both rifle's accuracy and point-of-impact, so it's difficult to work up a load for both velocity and accuracy at the same time. The solution is to put the "bayonet" (as the muzzle-mounted part is called) on a separate base, so it doesn't affect the barrel vibrations.
The trouble with this is some benches aren't long enough to provide quite enough room.
On the other hand, the Magnetospeed costs considerably less than the Labradar, and only requires one or two standard batteries, depending on the model--which last a long time.
Magneto speed is that it give actual "muzzle" velocity while conventional chronographs require 10 to 15 feet behind the screens
