JB, thanks for another informative article. I'm on my third chrono. First was a Shooting Chrony, then a Pact timer with the chrono mod in it. Now a Pro Chrono Digital. The Pact was good for years then began to show faster than normal readings, especially when the battery voltage dropped. It is too old to be repaired now they tell me, (1985 vintage). The Pro Chrono is a pleasure to set up and use.
I usually record "extreme spread" instead of SD. Is it equally worthless with a small number of shots?
