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Message: <blockquote data-quote="Bob Wright" data-source="post: 1957512" data-attributes="member: 104363">I couldn't interpret my target if using a magnetospeed mounted on the barrel. Scott did this I believe, but was purely looking for velocity flats, not target dispersion and velocity flats. So, I would shoot another ladder at 300 yards, in .2 powder increments aiming at the same point without your magnetospeed. At least you won't have an unpredictable element in this type of chronograph. Once you locate a flat of 2 or more rounds, that is near the velocity ( you already have this data) you need for hunting performance, shoot in the middle of that with 5-10 rounds. See if it's truly a repeatable node.Then, you can go back and check for a final speed for ballistic calculations.</blockquote>