Reply To: What is standard deviation?
SD is one of the most valuable pieces of information that you can get from the chrony. It’s nice to know both SD and ES. But I usually ignore the ES, as SD tells me a lot more.
Assume two 10-shot strings.
10 shot string #1:
10 shot string #2:
SD is a better indicator of shot string quality and hit probability.
If shooting a difficult field target, a gun yielding string #1 will likely give a much higher target hit rate than a gun yielding string #2. That is an extreme example, but it still holds for examples with lower ES and lower SD.