If I may, the 1st, 4th, and 5th shots show the least vertical. If you have chrono speeds on those there may be something to learn. There might not be much of a future in looking at 1-2-3 as a great group if the speeds vary too much. I'm just saying look at the data and the target to get to the meat. I've also seen this happen where the earliest shots landed differently because of the shooter being intent and holding the rifle much more firmly. For later shots the shooter relaxes a bit.