This is the year I really started to use my chronograph for more detailed load development. They work really well as one tries to replicate the ballistics of one good load using different propellants and primes. The shortage of components for most of 2009 makes you have to work a little more.
So the thing about my chronograph is that it eats 9 volt batteries. I also discovered that 9 bolt batteries are like communal food on a firing line because everyone else's chronograph also eats 9 volt batteries. I have yet to run one of my batteries all the way down. They all seem to get fed to my friend's machines before that happens.