Ditto to what Mule Deer and Denton posted about sample size, etc. Just because a device will calculate a statistic doesn't mean it's meaningful.
OTOH, there 's an old dude (older than me, even) who frequents our range and fires hundreds of rounds, every one over a chronograph, and meticulously logs all of them. He scoffs at SD, doesn't even know what it is.
He has fun, though.
Paul
