From the example given above, if you posted a high shot and the chrono indicated the velocity was high, would that really help you on the next shot? No, for a couple reasons. First, the velocity would need to be quite high compared to the average to push your shot high. For a .308 shooting 185s, it would have to be in the neighborhood of 20 fps faster to put you out of the 10-ring. If your load has that kind of ES/SD, you have bigger problems than monitoring the velocity after each shot and trying to match it to what you saw on the target. This is because the velocity you just read has no bearing whatsoever on the velocity of the next round. Further, if your load has a 20+ fps ES, the chances the velocity of your next shot are dramatically different than the last are very good. So you can't make any prediction as to what the next shot velocity will be, or use it to your advantage in terms of hold. This is simple probability, and is exactly the reason most F-Class shooters strive to keep their ES below 10 fps whenever possible, because ES below 10 fps means your load should hold X-ring vertical, barring any wind effects. If you are absolutely confident that your load velocity isn't varying more than 10 fps or so, then I would agree that a high/low shot associated with a high/low velocity would be useful information. Unfortunately, if you know your ES is that good, you really have no need for the chrono. By the same reasoning, if you do happen see a velocity excursion of 15-20 fps (or more) from the norm during a match, that tells you immediately that your load velocity isn't nearly as consistent as you thought it was. That means you have no idea how far off the norm the next shot will be, it might also be high, or it might be average, or it might be low. Therefore, you can't use the velocity of the previous shot to predict the next. It simply doesn't work that way.