Good thing you put a smiley at the end cuz the 10 foot difference in where readings are taken would only account for about 8 of those fps. Could be lighting issues as I do most of my chronoing as the sun's coming up. However, I try to do it when it's cloudy to minimize sun angle. Or, it could just be due to inherent variations in small sample sizes. Will be interesting to see how readings compare from the same shots.
