I'll take another reading with the next loading (when I alter the first to try to get something better suited for my needs), and then think about what can be interpolated from the new data.
Measuring velocity helps me on the first part, and the deviation/spread info gives me something to consider when things aren't going right with either the first or the second part. Personally, I figure that I want to make sure that 1) my loads are traveling with enough velocity to impart proper damage on the other end, but 2) I want them to hit accurately from my guns. in which case, you'll need the chronograph to help you in load-development. Or, you might want to shoot the fastest/most accurate/most consistent load ever. You might not at all care about the info from a chronograph, and you might not want one. Doesn't mean that the info would be of any use or importance to the next guy. If a bunch of us decided that we wanted our bullets to be fast, accurate and shiny in flight, we could rig up a device to measure the albedo of the bullet as it flew to the target after it left the barrel. It's all just info to help you get where you're going - you decide where that is. You're exactly right - sometimes wonderfully accurate loads have big spreads. Or am I just trying to overanalyze this and should be happy with a small group and the knowledge of its velocity?
