how often do you use a chronograph ?

Thanks for all the replies I can see that a chronograph gives some real good information, I no longer think of them as gimmicky, or a waste of funds. I guess that if I want a chronograph I'm going to have to get several air guns so I can justify having to use it .. HONEY , I WANT A CHRONOGRAPH, BUT I AM ALSO GOING TO NEED AT LEAST THREE MORE AIRGUNS SO I CAN GET THE MOST OUT OF THE CHRONOGRAPH...LOL .YA KNOW, EVEN IN PRINT THAT WON'T FLY! My next question to post on the forum HOW DO YOU ALL EXPLAIN YOUR PURCHASES TO THE SANE ONES? WITHOUT BEING COMMITTED , DEVORCED, OR IN MY CASE BARIED ALIVE !!

Are they necessary? No. Are they helpful. Almost always, if the gun can be tuned easily. Seems the more complicated (tunable?) a gun is the more a chronograph can help. But even an Impact with all it's potential settings could be shot happily by most without one. It just might not be shooting at it's full potential.